81390911 (number)

81390911 is an odd 8-digits composite number following 81390910 and preceding 81390912. In scientific notation, it is written as 8.1390911 × 10^7. The sum of its digits is 32. It has a total of 4 prime factors and 12 positive divisors. There are 69617520 positive integers (up to 81390911) that are relatively prime to 81390911.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1390911 × 10^7
Engineering notation 8.1390911 × 10^6

Prime Factorization of 81390911

Prime Factorization 7 × 7 × 571 × 2909

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 11627273
Product of the distinct prime numbers

The prime factorization of 81390911 is 7 × 7 × 571 × 2909. Since it has a total of 4 prime factors.

Most popular turbo-numbers

6, 6, 86, 51, 736, 141, 5240, 1705, 24445, 88196, 616160, 997755, 4719493, 1174073, 99237749, 54360602, 960111511, 352236303, 9612497675, 6474764906

Basic calculations (n = 81390911)

Multiplication

n×y
n×2 162781822
n×3 244172733
n×4 325563644
n×5 406954555

Division

n÷y
n÷2 40695455.5
n÷3 27130303.666667
n÷3 20347727.75
n÷5 16278182.2

Exponentiation

ny
n2 6624480393409921
n3 5.3917249412127E+23
n4 4.3883740482672E+31
n5 3.5717376159723E+39

Nth Root

y√n
2√n 9021.6911385837
3√n 433.36979292178
4√n 94.982583343388
5√n 38.204558205774

Divisors of 81390911

1, 7, 49, 571, 2909, 3997, 20363, 27979, 142541, 1661039, 11627273, 81390911

12 divisors

τ Total Divisors 12
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81390910
Sum of the proper positive divisors of n
A Arithmetic Mean 0.083333333333333
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 12
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81390911 can be divided by 12 positive divisors. The sum of these divisors (counting 81390911) is 1, the average is 0.083333333333333.

Base conversion 81390911

Base System Value
2 Binary 100110110011110110100111111
3 Ternary 12200011002100012
4 Quaternary 10312132310333
5 Quinary 131314002121
6 Senary 12024253435
8 Octal 466366477
10 Decimal 81390911
12 Duodecimal 2331127b
16 Hexadecimal 4d9ed3f
20 Vigesimal 158dh5b
36 Base36 1cghmn

Cryptographic Hash Functions

md5 ba6ad3394dcd553d65671610b9354337
sha1 6d17830611891b36c380674c34b4b35aa78f56ca
sha256 d2cc25fd3427adbd74974304653f6f4c94161743d9fdc66b6bd9fbdf19fc6ed1
sha512 5de4168399065de5b0f88bc0fc09d7e45d3b6328a9137ce13730f34db5f2ede4f037457d94b07e9710824db79427a839beef2ce52f6d44a2f91815e36fc842ff
ripemd-160 b7067d41a72d925b194bcf00fd67a367e3e146c8

81390911 as geometric shapes

Circle

Radius = n
Diameter 162781822
Circumference 511394176.13316
Area 2.0811418937786E+16

Sphere

Radius = n
Volume 2.2584804620654E+24
Surface area 8.3245675751145E+16
Circumference 511394176.13316

Square

Length = n
Perimeter 325563644
Area 6624480393409921
Diagonal 115104130.1901

Cube

Length = n
Surface area 39746882360459526
Volume 5.3917249412127E+23
Space diagonal 140973193.12632

Equilateral Triangle

Length = n
Perimeter 244172733
Area 2.8684841537825E+15
Altitude 70486596.563158

Triangular Pyramid

Length = n
Surface area 2.8684841537825E+15
Volume 6.3542087803736E+22
Height 38368043.396701