81639 (number)

81639 is an odd 5-digits composite number following 81638 and preceding 81640. In scientific notation, it is written as 8.1639 × 10^4. The sum of its digits is 27. It has a total of 3 prime factors and 8 positive divisors. There are 52992 positive integers (up to 81639) that are relatively prime to 81639.

Interesting facts

Basic properties

Name

Name eighty-one thousand six hundred thirty-nine

Notation

Scientific notation 8.1639 × 10^4
Engineering notation 8.1639 × 10^3

Prime Factorization of 81639

Prime Factorization 9 × 47 × 193

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 81639
Product of the distinct prime numbers

The prime factorization of 81639 is 9 × 47 × 193. Since it has a total of 3 prime factors.

Most popular turbo-numbers

8, 9, 56, 70, 85, 198, 7343, 5434, 10322, 49872, 79486, 681974, 4615759, 774574, 41220634, 24557209, 307895254, 592562289, 6702437120, 5404535773

Basic calculations (n = 81639)

Multiplication

n×y
n×2 163278
n×3 244917
n×4 326556
n×5 408195

Division

n÷y
n÷2 40819.5
n÷3 27213
n÷3 20409.75
n÷5 16327.8

Exponentiation

ny
n2 6664926321
n3 544117919920119
n4 4.4421242864359E+19
n5 3.6265058462034E+24

Nth Root

y√n
2√n 285.72539264126
3√n 43.380966687148
4√n 16.903413638708
5√n 9.6023942996448

Divisors of 81639

1, 9, 47, 193, 423, 1737, 9071, 81639

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 -81638
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 81639 can be divided by 8 positive divisors. The sum of these divisors (counting 81639) is 1, the average is 0.125.

Base conversion 81639

Base System Value
2 Binary 10011111011100111
3 Ternary 11010222200
4 Quaternary 103323213
5 Quinary 10103024
6 Senary 1425543
8 Octal 237347
10 Decimal 81639
12 Duodecimal 3b2b3
16 Hexadecimal 13ee7
20 Vigesimal a41j
36 Base36 1qzr

Cryptographic Hash Functions

md5 d18c832e8c956b4ef8b92862e6bf470d
sha1 061d0651a5b0c3f9bd0e8b7d034771d9c63fd69f
sha256 2c3071063c237b4045675ce02694ec54442226e8d72b4de4b61e5bf183434d36
sha512 605174e7f3033a307466083ea7e2b6dc29849cdb6829c581ce8dfe9e7c77b4e9140563d80fb9fa2602e34d7b7279f4ff9b4899342c86efaea40379b77836dba6
ripemd-160 d04da452c0ce28770d87f15d1b77549cddbf5dfb

81639 as geometric shapes

Circle

Radius = n
Diameter 163278
Circumference 512952.96529283
Area 20938483566.771

Sphere

Radius = n
Volume 2.2791958132101E+15
Surface area 83753934267.083
Circumference 512952.96529283

Square

Length = n
Perimeter 326556
Area 6664926321
Diagonal 115454.98101858

Cube

Length = n
Surface area 39989557926
Volume 544117919920119
Space diagonal 141402.89587912

Equilateral Triangle

Length = n
Perimeter 244917
Area 2885997754.1688
Altitude 70701.447939558

Triangular Pyramid

Length = n
Surface area 2885997754.1688
Volume 64124911823439
Height 38484.993672859