Math question: If 721 is divided by 9 and then multiplied by 5, what is the result?

To find the result, we first divide 721 by 9, which equals 80 with a remainder of 1. Then, if we multiply this result by 5, we get 400 with a remainder of 5. Hence, the final result is 400 + 5 = 405.

Math question: If a number, when divided by 12, leaves a remainder of 1, and when divided by 17, leaves a remainder of 9, what is the number?

To find the number, we need to solve the simultaneous congruences: x ≡ 1 (mod 12) x ≡ 9 (mod 17) Using the Chinese Remainder Theorem, we can rewrite the first congruence as x ≡ 13 (mod 12) since 12 + 1 = 13. Now, to solve 13 ≡ x (mod 17), we find that x = 13 + 17k, where k is an integer. By substituting different values for k, we can determine the smallest positive solution that satisfies both equations. By trying, we find k = 7 works: x = 13 + 17(7) = 134. Therefore, the number is 134.

Math question: If the number 721 is multiplied by 3 and then divided by 7, what is the result?

To find the result, we multiply 721 by 3, obtaining 2163. Then, we divide 2163 by 7, resulting in 309 with a remainder of 0. Therefore, the answer is 309.

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

721 (number)

721 is an odd 3-digits composite number following 720 and preceding 722. In scientific notation, it is written as 7.21 × 10^2. The sum of its digits is 10. It has a total of 2 prime factors and 4 positive divisors. There are 612 positive integers (up to 721) that are relatively prime to 721.

Interesting facts

721 has 4 divisors, whose sum is 832
The reverse of 721 is 127
Previous prime number is 7

Basic properties

Is Prime? no
Number parity odd
Number length 3
Sum of Digits 10
Digital Root 1

Name

Name	seven hundred twenty-one

Notation

Scientific notation	7.21 × 10^2
Engineering notation	7.21 × 10^0

Prime Factorization of 721

Prime Factorization 7 × 103

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	721	Product of the distinct prime numbers

The prime factorization of 721 is 7 × 103. Since it has a total of 2 prime factors.

Most popular turbo-numbers

6, 6, 23, 51, 220, 468, 2377, 9015, 23302, 50909, 750124, 827945, 7365112, 4896197, 17507467, 28257004, 914002885, 787782730, 8238151252, 5874597338

Basic calculations (n = 721)

Multiplication

n×y

n×2	1442
n×3	2163
n×4	2884
n×5	3605

Division

n÷y

n÷2	360.5
n÷3	240.33333333333
n÷3	180.25
n÷5	144.2

Exponentiation

n^y

n²	519841
n³	374805361
n⁴	270234665281
n⁵	194839193667601

Nth Root

^y√n

²√n	26.851443164195
³√n	8.9669570223935
⁴√n	5.1818378172416
⁵√n	3.7289542315056

Divisors of 721

1, 7, 103, 721

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	-720	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 721 can be divided by 4 positive divisors. The sum of these divisors (counting 721) is 1, the average is 0.25.

Base conversion 721

Base	System	Value
2	Binary	1011010001
3	Ternary	222201
4	Quaternary	23101
5	Quinary	10341
6	Senary	3201
8	Octal	1321
10	Decimal	721
12	Duodecimal	501
16	Hexadecimal	2d1
20	Vigesimal	1g1
36	Base36	k1

Cryptographic Hash Functions

md5	aba3b6fd5d186d28e06ff97135cade7f
sha1	0707dcc10ec1cfee92b537a96faab0a38f7bc5a1
sha256	74de057f768beb42de17ffc4b8a56100f0bed85947ecacaef111e3d3ec997950
sha512	d8b8d8b65ec4079580e31bcab95593329deee20096fa76bd569a457a5b6590e511f53ae1ef6771b810668778686593dfdda6204f064c7dfdc8a842534c7baf87
ripemd-160	e9d4688e789649c01774814edabb3276afa50426

721 as geometric shapes

Circle

Radius = n

Diameter	1442
Circumference	4530.1766064765
Area	1633128.6666348

Sphere

Radius = n

Volume	1569981024.8582
Surface area	6532514.6665391
Circumference	4530.1766064765

Square

Length = n

Perimeter	2884
Area	519841
Diagonal	1019.647978471

Cube

Length = n

Surface area	3119046
Volume	374805361
Space diagonal	1248.8086322572

Equilateral Triangle

Length = n

Perimeter	2163
Area	225097.75596435
Altitude	624.40431612858

Triangular Pyramid

Length = n

Surface area	225097.75596435
Volume	44171235.398029
Height	339.88265949033