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

81091391 (number)

81091391 is an odd 8-digits prime number following 81091390 and preceding 81091392. In scientific notation, it is written as 8.1091391 × 10^7. The sum of its digits is 32. It has a total of 1 prime factors and 2 positive divisors. There are 81091390 positive integers (up to 81091391) that are relatively prime to 81091391.

Interesting facts

81091391 has 2 divisors, whose sum is 81091392
The reverse of 81091391 is 19319018
Previous prime number is 1

Basic properties

Is Prime? yes
Number parity odd
Number length 8
Sum of Digits 32
Digital Root 5

Name

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

Notation

Scientific notation	8.1091391 × 10^7
Engineering notation	8.1091391 × 10^6

Prime Factorization of 81091391

Prime Factorization 81091391

Composite number

ω	Distinct Factors	1	Total number of distinct prime factors
Ω	Total Factors	1	Total number of prime factors
rad	Radical	81091391	Product of the distinct prime numbers

The prime factorization of 81091391 is 81091391. Since it has a total of 1 prime factors.

Most popular turbo-numbers

3, 6, 37, 40, 619, 707, 5009, 7914, 79785, 21431, 804682, 797832, 3783859, 4023690, 46152852, 45377579, 705199943, 717050044, 6030500677, 8133025026

Basic calculations (n = 81091391)

Multiplication

n×y

n×2	162182782
n×3	243274173
n×4	324365564
n×5	405456955

Division

n÷y

n÷2	40545695.5
n÷3	27030463.666667
n÷3	20272847.75
n÷5	16218278.2

Exponentiation

n^y

n²	6575813694314881
n³	5.3324187942884E+23
n⁴	4.3241325742339E+31
n⁵	3.5064992531304E+39

Nth Root

^y√n

²√n	9005.0758464324
³√n	432.83753663421
⁴√n	94.895078093821
⁵√n	38.176398032502

Divisors of 81091391

1, 81091391

2 divisors

τ	Total Divisors	2	Total number of the positive divisors of n
σ	Sum of Divisors	81091392	Sum of all the positive divisors of n
s	Aliquot Sum	1	Sum of the proper positive divisors of n
A	Arithmetic Mean	40545696	Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G	Geometric Mean	9005.0759019566	Returns the nth root of the product of n divisors
H	Harmonic Mean	1.9999999753365	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81091391 can be divided by 2 positive divisors. The sum of these divisors (counting 81091391) is 81091392, the average is 40545696.

Base conversion 81091391

Base	System	Value
2	Binary	100110101010101101100111111
3	Ternary	12122120212110212
4	Quaternary	10311111230333
5	Quinary	131224411031
6	Senary	12014023035
8	Octal	465255477
10	Decimal	81091391
12	Duodecimal	231a7a7b
16	Hexadecimal	4d55b3f
20	Vigesimal	156g89b
36	Base36	1ca2in

Cryptographic Hash Functions

md5	66b084dbef95e2d05006ca596464337d
sha1	2c5924f282a2f6af037dd8f568f186e1a9e9d34b
sha256	39797c04519bf465b7d534ddc5bd82fea57ca7c89085507ba56b7d3d4e315ae1
sha512	ba0bc1fc60b76aa0dd3aec20a89a593de926c346188b3884e9c66cba13898403e7064af8c11c22d4c3c37d31afa374c6b99aea9de2e54de13209ac2b30bc678c
ripemd-160	cacf63df79dedb965f54635f19ae56ca6d8d001c

81091391 as geometric shapes

Circle

Radius = n

Diameter	162182782
Circumference	509512236.46995
Area	2.0658527993435E+16

Sphere

Radius = n

Volume	2.2336383613334E+24
Surface area	8.2634111973739E+16
Circumference	509512236.46995

Square

Length = n

Perimeter	324365564
Area	6575813694314881
Diagonal	114680544.9439

Cube

Length = n

Surface area	39454882165889286
Volume	5.3324187942884E+23
Space diagonal	140454409.26843

Equilateral Triangle

Length = n

Perimeter	243274173
Area	2.8474108549151E+15
Altitude	70227204.634217

Triangular Pyramid

Length = n

Surface area	2.8474108549151E+15
Volume	6.2843158159466E+22
Height	38226848.314633