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

81121639 (number)

81121639 is an odd 8-digits composite number following 81121638 and preceding 81121640. In scientific notation, it is written as 8.1121639 × 10^7. The sum of its digits is 31. It has a total of 2 prime factors and 4 positive divisors. There are 80982856 positive integers (up to 81121639) that are relatively prime to 81121639.

Interesting facts

81121639 has 4 divisors, whose sum is 81260424
The reverse of 81121639 is 93612118
Previous prime number is 587

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 31
Digital Root 4

Name

Name	eighty-one million one hundred twenty-one thousand six hundred thirty-nine

Notation

Scientific notation	8.1121639 × 10^7
Engineering notation	8.1121639 × 10^6

Prime Factorization of 81121639

Prime Factorization 587 × 138197

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	81121639	Product of the distinct prime numbers

The prime factorization of 81121639 is 587 × 138197. Since it has a total of 2 prime factors.

Most popular turbo-numbers

6, 8, 26, 1, 786, 305, 5784, 7115, 10342, 99163, 552250, 787061, 9438611, 2076456, 92937713, 43098292, 388679656, 569061395, 4949617978, 2428591940

Basic calculations (n = 81121639)

Multiplication

n×y

n×2	162243278
n×3	243364917
n×4	324486556
n×5	405608195

Division

n÷y

n÷2	40560819.5
n÷3	27040546.333333
n÷3	20280409.75
n÷5	16224327.8

Exponentiation

n^y

n²	6580720314046321
n³	5.3383881767603E+23
n⁴	4.3305879851702E+31
n⁵	3.5130439519071E+39

Nth Root

^y√n

²√n	9006.7551870804
³√n	432.89134769892
⁴√n	94.903926088863
⁵√n	38.17924565274

Divisors of 81121639

1, 587, 138197, 81121639

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	-81121638	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 81121639 can be divided by 4 positive divisors. The sum of these divisors (counting 81121639) is 1, the average is 0.25.

Base conversion 81121639

Base	System	Value
2	Binary	100110101011101000101100111
3	Ternary	12122122101222011
4	Quaternary	10311131011213
5	Quinary	131231343024
6	Senary	12014415051
8	Octal	465350547
10	Decimal	81121639
12	Duodecimal	23201487
16	Hexadecimal	4d5d167
20	Vigesimal	157041j
36	Base36	1capuv

Cryptographic Hash Functions

md5	f297112cb243d8e23d2efa78b00a4583
sha1	7b4389d82d53534b51eac4c479f5ab5d1c20b6a6
sha256	183c0ad6893611df328c2347821b73109553b79fcc72b336e5fa1faef9c3b647
sha512	846dc8f4b1812e99b5916050e325fa2bc8950a0f9c4c08601a2c1bddf8affcf802aa5d9e8c732facc6a4fa2bf7244b7f027616f8f7b2c8443895c8f79d847772
ripemd-160	06de68f4312e5ebd65a6fd524e924a7c3948d51a

81121639 as geometric shapes

Circle

Radius = n

Diameter	162243278
Circumference	509702290.25913
Area	2.0673942593937E+16

Sphere

Radius = n

Volume	2.2361388104161E+24
Surface area	8.2695770375748E+16
Circumference	509702290.25913

Square

Length = n

Perimeter	324486556
Area	6580720314046321
Diagonal	114723322.07573

Cube

Length = n

Surface area	39484321884277926
Volume	5.3383881767603E+23
Space diagonal	140506800.34126

Equilateral Triangle

Length = n

Perimeter	243364917
Area	2.8495354835822E+15
Altitude	70253400.17063

Triangular Pyramid

Length = n

Surface area	2.8495354835822E+15
Volume	6.2913508006555E+22
Height	38241107.358578