81397981, eighty-one million three hundred ninety-seven thousand nine hundred eighty-one: Prime Factorization, Divisors, Base conversion, Basic calculations, Geometric Shapes

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

Interesting facts

81397981 has 8 divisors, whose sum is 93141440
The reverse of 81397981 is 18979318
Previous prime number is 859

Basic properties

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

Name

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

Notation

Scientific notation	8.1397981 × 10^7
Engineering notation	8.1397981 × 10^6

Prime Factorization of 81397981

Prime Factorization 7 × 859 × 13537

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81397981	Product of the distinct prime numbers

The prime factorization of 81397981 is 7 × 859 × 13537. Since it has a total of 3 prime factors.

Most popular turbo-numbers

2, 7, 55, 11, 497, 545, 8771, 1089, 19389, 80692, 531071, 234811, 1100740, 1844513, 65862377, 74164948, 605608729, 522313126, 1031863738, 66532825

Basic calculations (n = 81397981)

Multiplication

n×y

n×2	162795962
n×3	244193943
n×4	325591924
n×5	406989905

Division

n÷y

n÷2	40698990.5
n÷3	27132660.333333
n÷3	20349495.25
n÷5	16279596.2

Exponentiation

n^y

n²	6625631310876361
n³	5.3931301155572E+23
n⁴	4.3898990267665E+31
n⁵	3.5732891757266E+39

Nth Root

^y√n

²√n	9022.0829634847
³√n	433.38234074268
⁴√n	94.98464593546
⁵√n	38.205221908486

Divisors of 81397981

1, 7, 859, 6013, 13537, 94759, 11628283, 81397981

8 divisors

τ	Total Divisors	8	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-81397980	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.125	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	8	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81397981 can be divided by 8 positive divisors. The sum of these divisors (counting 81397981) is 1, the average is 0.125.

Base conversion 81397981

Base	System	Value
2	Binary	100110110100000100011011101
3	Ternary	12200011110001001
4	Quaternary	10312200203131
5	Quinary	131314213411
6	Senary	12024350301
8	Octal	466404335
10	Decimal	81397981
12	Duodecimal	23315391
16	Hexadecimal	4da08dd
20	Vigesimal	158eej1
36	Base36	1cgn31

Cryptographic Hash Functions

md5	39b65f8deec9b0e5186b7b47b55f3944
sha1	6890505edd75bc95bf0564f9b5e99479e39b31e9
sha256	07b9e7aae4e3f90c8e0f0d51fa9f8a2e3bd9c133f9006677d91115ec0adf707d
sha512	42dae5d8cbd13107a3853136115b99e5839d55e254ff396acc98b4827ac8be9c4eb0008434306193c9ac3491b74dcf80d28a91ddf735a135506624652564628a
ripemd-160	67250f1389072ca3d0e31253ab10a292c994a009

81397981 as geometric shapes

Circle

Radius = n

Diameter	162795962
Circumference	511438598.25328
Area	2.0815034651644E+16

Sphere

Radius = n

Volume	2.2590690601184E+24
Surface area	8.3260138606575E+16
Circumference	511438598.25328

Square

Length = n

Perimeter	325591924
Area	6625631310876361
Diagonal	115114128.67999

Cube

Length = n

Surface area	39753787865258166
Volume	5.3931301155572E+23
Space diagonal	140985438.72553

Equilateral Triangle

Length = n

Perimeter	244193943
Area	2.8689825156643E+15
Altitude	70492719.362763

Triangular Pyramid

Length = n

Surface area	2.8689825156643E+15
Volume	6.3558647942198E+22
Height	38371376.226663