81279639 (number)

81279639 is an odd 8-digits composite number following 81279638 and preceding 81279640. In scientific notation, it is written as 8.1279639 × 10^7. The sum of its digits is 45. It has a total of 4 prime factors and 16 positive divisors. There are 44198784 positive integers (up to 81279639) that are relatively prime to 81279639.

Interesting facts

Basic properties

Name

Name eighty-one million two hundred seventy-nine thousand six hundred thirty-nine

Notation

Scientific notation 8.1279639 × 10^7
Engineering notation 8.1279639 × 10^6

Prime Factorization of 81279639

Prime Factorization 4137 × 9 × 37 × 59

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81279639
Product of the distinct prime numbers

The prime factorization of 81279639 is 4137 × 9 × 37 × 59. Since it has a total of 4 prime factors.

Most popular turbo-numbers

7, 7, 48, 22, 545, 935, 3564, 5486, 84392, 7206, 808722, 744917, 9316323, 9811881, 68808837, 57600761, 761691103, 634729224, 4240033650, 8357794700

Basic calculations (n = 81279639)

Multiplication

n×y
n×2 162559278
n×3 243838917
n×4 325118556
n×5 406398195

Division

n÷y
n÷2 40639819.5
n÷3 27093213
n÷3 20319909.75
n÷5 16255927.8

Exponentiation

ny
n2 6606379715970321
n3 5.3696415841099E+23
n4 4.3644252951584E+31
n5 3.5473891243294E+39

Nth Root

y√n
2√n 9015.5221146642
3√n 433.17221182854
4√n 94.950103289382
5√n 38.194106364949

Divisors of 81279639

1, 9, 37, 59, 333, 531, 2183, 4137, 19647, 37233, 153069, 244083, 1377621, 2196747, 9031071, 81279639

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 -81279638
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 81279639 can be divided by 16 positive divisors. The sum of these divisors (counting 81279639) is 1, the average is 0.0625.

Base conversion 81279639

Base System Value
2 Binary 100110110000011101010010111
3 Ternary 12122221102201000
4 Quaternary 10312003222113
5 Quinary 131301422024
6 Senary 12022034343
8 Octal 466035227
10 Decimal 81279639
12 Duodecimal 232789b3
16 Hexadecimal 4d83a97
20 Vigesimal 157jj1j
36 Base36 1ce3rr

Cryptographic Hash Functions

md5 61ceee3217d72168d74533d290a4a091
sha1 26232b80f66256655113494240bdd2af5691bb6b
sha256 a0c4359c8b52c30939002ca04f249b75ae13cc2e45011fe0f3d98eb540c1b496
sha512 b6f3c01649ea131e5cc9066d6e4e20079328215a2d18b1d02ecd2632d898f8463817f726cfbb84f5514a04ac993c491225264daf62d36be1cd2767383f51e8e8
ripemd-160 e619b497914cc33524b04d3c85460c9532dffab3

81279639 as geometric shapes

Circle

Radius = n
Diameter 162559278
Circumference 510695033.53766
Area 2.0754553982517E+16

Sphere

Radius = n
Volume 2.2492302070733E+24
Surface area 8.3018215930068E+16
Circumference 510695033.53766

Square

Length = n
Perimeter 325118556
Area 6606379715970321
Diagonal 114946767.81859

Cube

Length = n
Surface area 39638278295821926
Volume 5.3696415841099E+23
Space diagonal 140780464.36886

Equilateral Triangle

Length = n
Perimeter 243838917
Area 2.8606463305383E+15
Altitude 70390232.184428

Triangular Pyramid

Length = n
Surface area 2.8606463305383E+15
Volume 6.3281832944423E+22
Height 38315589.272863