81591749 (number)

81591749 is an odd 8-digits composite number following 81591748 and preceding 81591750. In scientific notation, it is written as 8.1591749 × 10^7. The sum of its digits is 44. It has a total of 3 prime factors and 8 positive divisors. There are 79623792 positive integers (up to 81591749) that are relatively prime to 81591749.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1591749 × 10^7
Engineering notation 8.1591749 × 10^6

Prime Factorization of 81591749

Prime Factorization 139 × 59 × 9949

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 81591749
Product of the distinct prime numbers

The prime factorization of 81591749 is 139 × 59 × 9949. Since it has a total of 3 prime factors.

Most popular turbo-numbers

Basic calculations (n = 81591749)

Multiplication

n×y
n×2 163183498
n×3 244775247
n×4 326366996
n×5 407958745

Division

n÷y
n÷2 40795874.5
n÷3 27197249.666667
n÷3 20397937.25
n÷5 16318349.8

Exponentiation

ny
n2 6657213504879001
n3 5.431736933295E+23
n4 4.4318491649543E+31
n5 3.6160232467281E+39

Nth Root

y√n
2√n 9032.8151204373
3√n 433.72595730277
4√n 95.04112331216
5√n 38.223394129239

Divisors of 81591749

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 -81591748
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 81591749 can be divided by 8 positive divisors. The sum of these divisors (counting 81591749) is 1, the average is 0.125.

Base conversion 81591749

Base System Value
2 Binary 100110111001111110111000101
3 Ternary 12200112021211122
4 Quaternary 10313033313011
5 Quinary 131341413444
6 Senary 12032443325
8 Octal 467176705
10 Decimal 81591749
12 Duodecimal 233a9545
16 Hexadecimal 4dcfdc5
20 Vigesimal 159ij79
36 Base36 1ckslh

Cryptographic Hash Functions

md5 3b914be1d235bb3e48d83a85b61c7993
sha1 3aae61032098e62c7919fbf51c33897808baa71d
sha256 d612fd3104f9df60afb5741e39ec53e135c7b15dc0afd8775a99e3ae6b09ab1f
sha512 9ad37f97f7eb7ffe909e4ab340cb7d97de672b8f948cd4dcfeb75815c583f7c7317e64efc2064d36184a7fd8ddfc251195a405fb7234567b0af4f91d2d4113dc
ripemd-160 e1f718a436b413d05d4ec45807ffad3738826169

81591749 as geometric shapes

Circle

Radius = n
Diameter 163183498
Circumference 512656078.50388
Area 2.0914253040307E+16

Sphere

Radius = n
Volume 2.2752406461162E+24
Surface area 8.3657012161227E+16
Circumference 512656078.50388

Square

Length = n
Perimeter 326366996
Area 6657213504879001
Diagonal 115388158.01354

Cube

Length = n
Surface area 39943281029274006
Volume 5.431736933295E+23
Space diagonal 141321054.74641

Equilateral Triangle

Length = n
Perimeter 244775247
Area 2.882658006821E+15
Altitude 70660527.373204

Triangular Pyramid

Length = n
Surface area 2.882658006821E+15
Volume 6.4013633652572E+22
Height 38462719.337847