Math question: What is the product of the prime factors of the number 1391?

To find the prime factors of 1391, we use prime factorization. First, we divide 1391 by the smallest prime number, 2, which is not a factor. Then we divide it by 3, 5, 7, 11, 13, and so on, until the divisor is greater than the square root of the dividend. After performing this procedure, we find that 1391 is a prime number itself, as it has no prime factors other than 1391. Therefore, the product of the prime factors of 1391 is simply 1391 itself.

Math question: What is the sum of the digits in the number 1391?

To find the sum of the digits, we add each digit individually. In this case, the digits in 1391 are 1, 3, 9, and 1. Adding them up, we get 1 + 3 + 9 + 1 = 14. Therefore, the sum of the digits in the number 1391 is 14.

Math question: What is the largest prime factor of the number 1391?

To find the largest prime factor of 1391, we'll evaluate its prime factors. First, we determine if 2 is a factor; it isn't since 1391 is odd. Then, we check for divisibility by increasingly larger prime numbers. After dividing by 1391 ÷ 3 = 463.67 (not divisible), ÷ 5 = 278.2 (not divisible), ÷ 7 = 198.7 (not divisible) and ÷ 11 = 126.45 (not divisible), we find that 1391 ÷ 13 = 107. It's worth noting that 107 is prime, and thus it is the largest prime factor of 1391. So, the answer is 107.

Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

1391 (number)

1391 is an odd 4-digits composite number following 1390 and preceding 1392. In scientific notation, it is written as 1.391 × 10^3. The sum of its digits is 14. It has a total of 2 prime factors and 4 positive divisors. There are 1272 positive integers (up to 1391) that are relatively prime to 1391.

Interesting facts

1391 has 4 divisors, whose sum is 1512
The reverse of 1391 is 1931
Previous prime number is 13

Basic properties

Is Prime? no
Number parity odd
Number length 4
Sum of Digits 14
Digital Root 5

Name

Name	one thousand three hundred ninety-one

Notation

Scientific notation	1.391 × 10^3
Engineering notation	1.391 × 10^3

Prime Factorization of 1391

Prime Factorization 13 × 107

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	1391	Product of the distinct prime numbers

The prime factorization of 1391 is 13 × 107. Since it has a total of 2 prime factors.

Most popular turbo-numbers

8, 4, 8, 62, 113, 825, 1748, 9694, 68956, 2887, 545016, 854194, 4857968, 7904790, 43336314, 88115259, 640125139, 137113261, 7171359474, 7333252147

Basic calculations (n = 1391)

Multiplication

n×y

n×2	2782
n×3	4173
n×4	5564
n×5	6955

Division

n÷y

n÷2	695.5
n÷3	463.66666666667
n÷3	347.75
n÷5	278.2

Exponentiation

n^y

n²	1934881
n³	2691419471
n⁴	3743764484161
n⁵	5207576397467951

Nth Root

^y√n

²√n	37.296112397943
³√n	11.162865962294
⁴√n	6.1070543143109
⁵√n	4.252706647165

Divisors of 1391

1, 13, 107, 1391

4 divisors

τ	Total Divisors	4	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-1390	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.25	Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G	Geometric Mean	1	Returns the nth root of the product of n divisors
H	Harmonic Mean	4	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 1391 can be divided by 4 positive divisors. The sum of these divisors (counting 1391) is 1, the average is 0.25.

Base conversion 1391

Base	System	Value
2	Binary	10101101111
3	Ternary	1220112
4	Quaternary	111233
5	Quinary	21031
6	Senary	10235
8	Octal	2557
10	Decimal	1391
12	Duodecimal	97b
16	Hexadecimal	56f
20	Vigesimal	39b
36	Base36	12n

Cryptographic Hash Functions

md5	7f53f8c6c730af6aeb52e66eb74d8507
sha1	749fa825d1f9d8e78bd2495940f92586c04ef35a
sha256	01d77b0b1bd2fecc8ddd43210d4d10934aa31db043675f53eb46907a031d10d2
sha512	9bcc838a4f96dd9f473ee24548cafe5d688ba4fbb306d85f076e433d292d7f863faae68f260d06e398fb2917307bc29804c886efe5ac0a1c31bffe9a773d8f12
ripemd-160	236b6fb9025f848ef0e730149321247ae2551ea6

1391 as geometric shapes

Circle

Radius = n

Diameter	2782
Circumference	8739.9107622868
Area	6078607.9351705

Sphere

Radius = n

Volume	11273791517.096
Surface area	24314431.740682
Circumference	8739.9107622868

Square

Length = n

Perimeter	5564
Area	1934881
Diagonal	1967.171065261

Cube

Length = n

Surface area	11609286
Volume	2691419471
Space diagonal	2409.2826733283

Equilateral Triangle

Length = n

Perimeter	4173
Area	837828.04964992
Altitude	1204.6413366642

Triangular Pyramid

Length = n

Surface area	837828.04964992
Volume	317186826.4936
Height	655.72368842033