81749991 (number)

81749991 is an odd 8-digits composite number following 81749990 and preceding 81749992. In scientific notation, it is written as 8.1749991 × 10^7. The sum of its digits is 48. It has a total of 3 prime factors and 8 positive divisors. There are 51294080 positive integers (up to 81749991) that are relatively prime to 81749991.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1749991 × 10^7
Engineering notation 8.1749991 × 10^6

Prime Factorization of 81749991

Prime Factorization 17 × 3 × 1602941

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 81749991
Product of the distinct prime numbers

The prime factorization of 81749991 is 17 × 3 × 1602941. Since it has a total of 3 prime factors.

Most popular turbo-numbers

9, 9, 15, 51, 581, 333, 8311, 5311, 9798, 37220, 654088, 26667, 645114, 5292540, 60456339, 70891225, 89832074, 198250863, 5262401779, 6701598156

Basic calculations (n = 81749991)

Multiplication

n×y
n×2 163499982
n×3 245249973
n×4 326999964
n×5 408749955

Division

n÷y
n÷2 40874995.5
n÷3 27249997
n÷3 20437497.75
n÷5 16349998.2

Exponentiation

ny
n2 6683061028500081
n3 5.4634017893233E+23
n4 4.4663304710657E+31
n5 3.6512247581264E+39

Nth Root

y√n
2√n 9041.5701623114
3√n 434.00617085098
4√n 95.087171386636
5√n 38.238209008323

Divisors of 81749991

1, 3, 17, 51, 1602941, 4808823, 27249997, 81749991

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 -81749990
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 81749991 can be divided by 8 positive divisors. The sum of these divisors (counting 81749991) is 1, the average is 0.125.

Base conversion 81749991

Base System Value
2 Binary 100110111110110011111100111
3 Ternary 12200211022220110
4 Quaternary 10313312133213
5 Quinary 131411444431
6 Senary 12040104103
8 Octal 467663747
10 Decimal 81749991
12 Duodecimal 23465033
16 Hexadecimal 4df67e7
20 Vigesimal 15aiejb
36 Base36 1co6p3

Cryptographic Hash Functions

md5 78a94a190f19fbce79f395a523296c8b
sha1 e632e3d83a9cf3e0230e0539cee8f8399917586c
sha256 b33782329d8ed38a2bdbbcb15c3546e7b6bb69570eef7c867934fcad3caad763
sha512 1b19ce3c758674c385587e35e4356cc092bcdfb3929db3c116416c8b2712fb8f963de3cb82cef5a9e482723cf17b838a7928b634df347475e56680cf2505c3bb
ripemd-160 8377125a4de113a86e593c4c11d91f40d0f0262d

81749991 as geometric shapes

Circle

Radius = n
Diameter 163499982
Circumference 513650342.31326
Area 2.0995455430628E+16

Sphere

Radius = n
Volume 2.288504389993E+24
Surface area 8.3981821722512E+16
Circumference 513650342.31326

Square

Length = n
Perimeter 326999964
Area 6683061028500081
Diagonal 115611945.99608

Cube

Length = n
Surface area 40098366171000486
Volume 5.4634017893233E+23
Space diagonal 141595137.9303

Equilateral Triangle

Length = n
Perimeter 245249973
Area 2.8938503128614E+15
Altitude 70797568.965149

Triangular Pyramid

Length = n
Surface area 2.8938503128614E+15
Volume 6.4386807559621E+22
Height 38537315.332026