81397979 (number)

81397979 is an odd 8-digits composite number following 81397978 and preceding 81397980. In scientific notation, it is written as 8.1397979 × 10^7. The sum of its digits is 53. It has a total of 2 prime factors and 4 positive divisors. There are 75136584 positive integers (up to 81397979) that are relatively prime to 81397979.

Interesting facts

Basic properties

Name

Name eighty-one million three hundred ninety-seven thousand nine hundred seventy-nine

Notation

Scientific notation 8.1397979 × 10^7
Engineering notation 8.1397979 × 10^6

Prime Factorization of 81397979

Prime Factorization 13 × 6261383

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 81397979
Product of the distinct prime numbers

The prime factorization of 81397979 is 13 × 6261383. Since it has a total of 2 prime factors.

Most popular turbo-numbers

6, 7, 87, 12, 809, 972, 1327, 6480, 18643, 46933, 780951, 15638, 3157431, 1248049, 74207096, 95513334, 127957835, 631048325, 76594341, 6132755483

Basic calculations (n = 81397979)

Multiplication

n×y
n×2 162795958
n×3 244193937
n×4 325591916
n×5 406989895

Division

n÷y
n÷2 40698989.5
n÷3 27132659.666667
n÷3 20349494.75
n÷5 16279595.8

Exponentiation

ny
n2 6625630985284441
n3 5.3931297180193E+23
n4 4.3898985953161E+31
n5 3.5732887367367E+39

Nth Root

y√n
2√n 9022.0828526455
3√n 433.38233719319
4√n 94.984645352002
5√n 38.205221720741

Divisors of 81397979

1, 13, 6261383, 81397979

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 -81397978
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 81397979 can be divided by 4 positive divisors. The sum of these divisors (counting 81397979) is 1, the average is 0.25.

Base conversion 81397979

Base System Value
2 Binary 100110110100000100011011011
3 Ternary 12200011110000222
4 Quaternary 10312200203123
5 Quinary 131314213404
6 Senary 12024350255
8 Octal 466404333
10 Decimal 81397979
12 Duodecimal 2331538b
16 Hexadecimal 4da08db
20 Vigesimal 158eeij
36 Base36 1cgn2z

Cryptographic Hash Functions

md5 b61f54c7fafa6997551a6611d374be02
sha1 199cf6909f10b9da648c7b959bb1fc00c0a828b3
sha256 d2cedfdbd39820559cddcefc603d09701247b836d5208e2cadf0290608627b18
sha512 e45e78d28b82dce4d6606ebe73df8c6913a1dd6bec1995107c295525c53812756279c8c5f643d32dd0c437569d428125d1d8f27c5865c33bf355339d2ca5d043
ripemd-160 8dec22adc6837658292d43c1fb9d8b3d86f1b7e9

81397979 as geometric shapes

Circle

Radius = n
Diameter 162795958
Circumference 511438585.68691
Area 2.0815033628767E+16

Sphere

Radius = n
Volume 2.2590688935982E+24
Surface area 8.3260134515066E+16
Circumference 511438585.68691

Square

Length = n
Perimeter 325591916
Area 6625630985284441
Diagonal 115114125.85156

Cube

Length = n
Surface area 39753785911706646
Volume 5.3931297180193E+23
Space diagonal 140985435.26142

Equilateral Triangle

Length = n
Perimeter 244193937
Area 2.8689823746788E+15
Altitude 70492717.630712

Triangular Pyramid

Length = n
Surface area 2.8689823746788E+15
Volume 6.3558643257169E+22
Height 38371375.283853