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

81091387 (number)

81091387 is an odd 8-digits composite number following 81091386 and preceding 81091388. In scientific notation, it is written as 8.1091387 × 10^7. The sum of its digits is 37. It has a total of 3 prime factors and 8 positive divisors. There are 73625760 positive integers (up to 81091387) that are relatively prime to 81091387.

Interesting facts

81091387 has 8 divisors, whose sum is 88761680
The reverse of 81091387 is 78319018
Previous prime number is 61

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 37
Digital Root 1

Name

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

Notation

Scientific notation	8.1091387 × 10^7
Engineering notation	8.1091387 × 10^6

Prime Factorization of 81091387

Prime Factorization 13 × 61 × 102259

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81091387	Product of the distinct prime numbers

The prime factorization of 81091387 is 13 × 61 × 102259. Since it has a total of 3 prime factors.

Most popular turbo-numbers

5, 6, 32, 27, 423, 609, 3861, 300, 52231, 16186, 786263, 883410, 7168370, 7048010, 25224979, 49771569, 111650926, 809759670, 9261125041, 6786852065

Basic calculations (n = 81091387)

Multiplication

n×y

n×2	162182774
n×3	243274161
n×4	324365548
n×5	405456935

Division

n÷y

n÷2	40545693.5
n÷3	27030462.333333
n÷3	20272846.75
n÷5	16218277.4

Exponentiation

n^y

n²	6575813045583769
n³	5.3324180051908E+23
n⁴	4.324131721047E+31
n⁵	3.506498388304E+39

Nth Root

^y√n

²√n	9005.0756243354
³√n	432.83752951734
⁴√n	94.895076923597
⁵√n	38.176397655876

Divisors of 81091387

1, 13, 61, 793, 102259, 1329367, 6237799, 81091387

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	-81091386	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 81091387 can be divided by 8 positive divisors. The sum of these divisors (counting 81091387) is 1, the average is 0.125.

Base conversion 81091387

Base	System	Value
2	Binary	100110101010101101100111011
3	Ternary	12122120212110201
4	Quaternary	10311111230323
5	Quinary	131224411022
6	Senary	12014023031
8	Octal	465255473
10	Decimal	81091387
12	Duodecimal	231a7a77
16	Hexadecimal	4d55b3b
20	Vigesimal	156g897
36	Base36	1ca2ij

Cryptographic Hash Functions

md5	4bf8b80287ce2c244bf987efb2179a9e
sha1	182464dfe9c67d1712f6d2df8aac88485288a6b0
sha256	de916289e2bb7e78cff7c129bd57b718306232f9a7a6091a56c5cd7d65b12396
sha512	0b78925516d11cb116c0fa9007543f60c34d445e8e03aa301bbc5ab66376fa33c25a99c11491df6a542068bd9fa811ecfe5089f007c3161028667da00ae42285
ripemd-160	585b2aa31bc7fae6acca182c07d81950a472d5a8

81091387 as geometric shapes

Circle

Radius = n

Diameter	162182774
Circumference	509512211.33721
Area	2.0658525955386E+16

Sphere

Radius = n

Volume	2.233638030797E+24
Surface area	8.2634103821544E+16
Circumference	509512211.33721

Square

Length = n

Perimeter	324365548
Area	6575813045583769
Diagonal	114680539.28705

Cube

Length = n

Surface area	39454878273502614
Volume	5.3324180051908E+23
Space diagonal	140454402.34023

Equilateral Triangle

Length = n

Perimeter	243274161
Area	2.8474105740063E+15
Altitude	70227201.170115

Triangular Pyramid

Length = n

Surface area	2.8474105740063E+15
Volume	6.2843148859861E+22
Height	38226846.429015