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

81738991 (number)

81738991 is an odd 8-digits composite number following 81738990 and preceding 81738992. In scientific notation, it is written as 8.1738991 × 10^7. The sum of its digits is 46. It has a total of 2 prime factors and 4 positive divisors. There are 80988984 positive integers (up to 81738991) that are relatively prime to 81738991.

Interesting facts

81738991 has 4 divisors, whose sum is 82489000
The reverse of 81738991 is 19983718
Previous prime number is 109

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 46
Digital Root 1

Name

Name	eighty-one million seven hundred thirty-eight thousand nine hundred ninety-one

Notation

Scientific notation	8.1738991 × 10^7
Engineering notation	8.1738991 × 10^6

Prime Factorization of 81738991

Prime Factorization 109 × 749899

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	81738991	Product of the distinct prime numbers

The prime factorization of 81738991 is 109 × 749899. Since it has a total of 2 prime factors.

Most popular turbo-numbers

3, 9, 8, 42, 422, 668, 4679, 6337, 27269, 90812, 484159, 783366, 5217273, 7866082, 70158311, 24183970, 980868993, 313806349, 6712314997, 9631411483

Basic calculations (n = 81738991)

Multiplication

n×y

n×2	163477982
n×3	245216973
n×4	326955964
n×5	408694955

Division

n÷y

n÷2	40869495.5
n÷3	27246330.333333
n÷3	20434747.75
n÷5	16347798.2

Exponentiation

n^y

n²	6681262649698081
n³	5.4611966759231E+23
n⁴	4.4639270594251E+31
n⁵	3.64876893735E+39

Nth Root

^y√n

²√n	9040.9618404238
³√n	433.98670384772
⁴√n	95.083972573846
⁵√n	38.237179912333

Divisors of 81738991

1, 109, 749899, 81738991

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	-81738990	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 81738991 can be divided by 4 positive divisors. The sum of these divisors (counting 81738991) is 1, the average is 0.25.

Base conversion 81738991

Base	System	Value
2	Binary	100110111110011110011101111
3	Ternary	12200210202211001
4	Quaternary	10313303303233
5	Quinary	131411121431
6	Senary	12035541131
8	Octal	467636357
10	Decimal	81738991
12	Duodecimal	2345a7a7
16	Hexadecimal	4df3cef
20	Vigesimal	15ah79b
36	Base36	1cny7j

Cryptographic Hash Functions

md5	e2249c835d9f1e0d26b1a5c70c09b6f3
sha1	013778f13ee5bc9425971f7bcadedceef2410b85
sha256	23572b492317f472dc35d440bd6bfad43ec5593117802aca361bdf0e317e7ed2
sha512	ff5a1d889fa0d026036c0cf04f5519bec41263aad8deb9997e5b097f4b063fe425a44da4a029ed7c704975b6d9e4093e5746646e66c723439960ef0315463470
ripemd-160	f10ec299861a834cdcd92dafb6728f6436cb91a1

81738991 as geometric shapes

Circle

Radius = n

Diameter	163477982
Circumference	513581227.27488
Area	2.0989805656995E+16

Sphere

Radius = n

Volume	2.2875807142519E+24
Surface area	8.3959222627981E+16
Circumference	513581227.27488

Square

Length = n

Perimeter	326955964
Area	6681262649698081
Diagonal	115596389.64689

Cube

Length = n

Surface area	40087575898188486
Volume	5.4611966759231E+23
Space diagonal	141576085.37142

Equilateral Triangle

Length = n

Perimeter	245216973
Area	2.8930715919973E+15
Altitude	70788042.685708

Triangular Pyramid

Length = n

Surface area	2.8930715919973E+15
Volume	6.4360820048977E+22
Height	38532129.882297