Math Question: What is the greatest prime factor of the number 845?

To find the greatest prime factor of 845, we first need to break it down into its prime factorization. Starting with the divisibility rule for 2, we see that it is not divisible by 2 (since the last digit is odd). Next, we check the divisibility rule for 3, and indeed, 8 + 4 + 5 = 17, which is not divisible by 3. Moving on to 5, it is also not divisible by 5 since the last digit is not 0 or 5. Now, let's try 7. By repeatedly subtracting multiples of 7, we see that 845 - 7 = 838, 838 - 14 = 824, 824 - 21 = 803, 803 - 28 = 775, 775 - 35 = 740, 740 - 42 = 698, 698 - 49 = 649, 649 - 56 = 593, 593 - 63 = 530, 530 - 70 = 460, 460 - 77 = 383. Thus, the greatest prime factor of 845 is 383.

Math question: What is the smallest prime number greater than 845 which is also a palindrome when written in base 10?

The smallest prime number greater than 845 is 853. To verify if it is a palindrome, we notice that the digits in the units and hundreds place are equivalent, and since there is only one digit in the tens place, it is also equivalent to itself. Hence, 853 is a palindrome.

Math question: What is the sum of the digits in the number 845?

To find the sum of the digits in 845, we add up each individual digit: 8 + 4 + 5 = 17.

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

845 (number)

845 is an odd 3-digits composite number following 844 and preceding 846. In scientific notation, it is written as 8.45 × 10^2. The sum of its digits is 17. It has a total of 3 prime factors and 6 positive divisors. There are 624 positive integers (up to 845) that are relatively prime to 845.

Interesting facts

845 has 6 divisors, whose sum is 1098
The reverse of 845 is 548
Previous prime number is 13

Basic properties

Is Prime? no
Number parity odd
Number length 3
Sum of Digits 17
Digital Root 8

Name

Name	eight hundred forty-five

Notation

Scientific notation	8.45 × 10^2
Engineering notation	8.45 × 10^0

Prime Factorization of 845

Prime Factorization 5 × 13 × 13

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	65	Product of the distinct prime numbers

The prime factorization of 845 is 5 × 13 × 13. Since it has a total of 3 prime factors.

Most popular turbo-numbers

10, 9, 88, 17, 40, 863, 2184, 5286, 64793, 74892, 29184, 617975, 7716509, 1213111, 85301248, 60123420, 938231035, 765737143, 4519929029, 6457972652

Basic calculations (n = 845)

Multiplication

n×y

n×2	1690
n×3	2535
n×4	3380
n×5	4225

Division

n÷y

n÷2	422.5
n÷3	281.66666666667
n÷3	211.25
n÷5	169

Exponentiation

n^y

n²	714025
n³	603351125
n⁴	509831700625
n⁵	430807787028125

Nth Root

^y√n

²√n	29.068883707497
³√n	9.4540719459828
⁴√n	5.3915567053957
⁵√n	3.8492076636545

Divisors of 845

1, 5, 13, 65, 169, 845

6 divisors

τ	Total Divisors	6	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-844	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.16666666666667	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	6	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 845 can be divided by 6 positive divisors. The sum of these divisors (counting 845) is 1, the average is 0.16666666666667.

Base conversion 845

Base	System	Value
2	Binary	1101001101
3	Ternary	1011022
4	Quaternary	31031
5	Quinary	11340
6	Senary	3525
8	Octal	1515
10	Decimal	845
12	Duodecimal	5a5
16	Hexadecimal	34d
20	Vigesimal	225
36	Base36	nh

Cryptographic Hash Functions

md5	b86e8d03fe992d1b0e19656875ee557c
sha1	292c7ebb82651f1977f19458c30a3bee33c808d7
sha256	3d34f102d1708fc5edd3111144f78764b4d7b745cb5450815780545495df1e68
sha512	2e14e3215ee15f6e67a0427cf37efc882ff0157f785161bbdfa4b9cbf569211e45656e9321b504054dae045da221cfb07697f3d9489fc38fbf0ffd60797a0e99
ripemd-160	060ba97b7deb5cd78f44e6c13b0ae7f59b0f6436

845 as geometric shapes

Circle

Radius = n

Diameter	1690
Circumference	5309.2915845668
Area	2243175.6944795

Sphere

Radius = n

Volume	2527311282.4468
Surface area	8972702.7779178
Circumference	5309.2915845668

Square

Length = n

Perimeter	3380
Area	714025
Diagonal	1195.0104602053

Cube

Length = n

Surface area	4284150
Volume	603351125
Space diagonal	1463.5829323957

Equilateral Triangle

Length = n

Perimeter	2535
Area	309181.89446859
Altitude	731.79146619785

Triangular Pyramid

Length = n

Surface area	309181.89446859
Volume	71105611.987339
Height	398.33682006842