81591697 (number)

81591697 is an odd 8-digits composite number following 81591696 and preceding 81591698. In scientific notation, it is written as 8.1591697 × 10^7. The sum of its digits is 46. It has a total of 4 prime factors and 16 positive divisors. There are 71824320 positive integers (up to 81591697) that are relatively prime to 81591697.

Interesting facts

Basic properties

Name

Name eighty-one million five hundred ninety-one thousand six hundred ninety-seven

Notation

Scientific notation 8.1591697 × 10^7
Engineering notation 8.1591697 × 10^6

Prime Factorization of 81591697

Prime Factorization 307 × 11 × 37 × 653

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81591697
Product of the distinct prime numbers

The prime factorization of 81591697 is 307 × 11 × 37 × 653. Since it has a total of 4 prime factors.

Most popular turbo-numbers

7, 3, 27, 6, 11, 72, 1898, 4948, 4715, 12411, 43654, 111569, 6586580, 5966032, 49224268, 34068996, 174259100, 159010774, 7800876092, 1116071697

Basic calculations (n = 81591697)

Multiplication

n×y
n×2 163183394
n×3 244775091
n×4 326366788
n×5 407958485

Division

n÷y
n÷2 40795848.5
n÷3 27197232.333333
n÷3 20397924.25
n÷5 16318339.4

Exponentiation

ny
n2 6657205019339809
n3 5.4317265480485E+23
n4 4.4318378669523E+31
n5 3.616011723935E+39

Nth Root

y√n
2√n 9032.8122420429
3√n 433.7258651621
4√n 95.04110816927
5√n 38.223389257136

Divisors of 81591697

1, 11, 37, 307, 407, 653, 3377, 7183, 11359, 24161, 124949, 200471, 265771, 2205181, 7417427, 81591697

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81591696
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
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 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81591697 can be divided by 16 positive divisors. The sum of these divisors (counting 81591697) is 1, the average is 0.0625.

Base conversion 81591697

Base System Value
2 Binary 100110111001111110110010001
3 Ternary 12200112021202201
4 Quaternary 10313033312101
5 Quinary 131341413242
6 Senary 12032443201
8 Octal 467176621
10 Decimal 81591697
12 Duodecimal 233a9501
16 Hexadecimal 4dcfd91
20 Vigesimal 159ij4h
36 Base36 1cksk1

Cryptographic Hash Functions

md5 e668e1f8b1dae98cb364f8432d21d848
sha1 20dd454190a15e16f4c4d1433990ec311d0e9d3b
sha256 38e5f22bb6158b9e34757cd709280014001a99fef1757e91974b58ee2aa56d19
sha512 a0246616ea7e989d3526d9188948787e609c2e8f00b0f3a4369b4b16b9200d07bcf3b2920ab43972e81e746752bddea2134911ff4f710460a3573ff2e7380626
ripemd-160 f98512704a91d0f3966439e227057d93c2a3e75f

81591697 as geometric shapes

Circle

Radius = n
Diameter 163183394
Circumference 512655751.77825
Area 2.0914226382199E+16

Sphere

Radius = n
Volume 2.2752362959544E+24
Surface area 8.3656905528796E+16
Circumference 512655751.77825

Square

Length = n
Perimeter 326366788
Area 6657205019339809
Diagonal 115388084.47444

Cube

Length = n
Surface area 39943230116038854
Volume 5.4317265480485E+23
Space diagonal 141320964.67977

Equilateral Triangle

Length = n
Perimeter 244775091
Area 2.8826543324748E+15
Altitude 70660482.339883

Triangular Pyramid

Length = n
Surface area 2.8826543324748E+15
Volume 6.4013511261269E+22
Height 38462694.824812