81689939 is an odd 8-digits prime number following 81689938
and preceding 81689940 . In scientific notation, it is written as 8.1689939 × 10^7.
The sum of its digits is 53. It has a total of 1 prime factors and 2 positive divisors.
There are 81689938 positive integers (up to 81689939) that are relatively prime to 81689939.
81689939 has 2 divisors, whose sum is 81689940
The reverse of 81689939 is 93998618
Previous prime number is 1
Is Prime? yes Number parity odd Number length 8 Sum of Digits 53 Digital Root 8
Name
eighty-one million six hundred eighty-nine thousand nine hundred thirty-nine
Scientific notation
8.1689939 × 10^7
Engineering notation
8.1689939 × 10^6
Prime Factorization
81689939
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
81689939 Product of the distinct prime numbers
The prime factorization of 81689939 is 81689939.
Since it has a total of 1 prime factors.
7 , 7 , 60 , 49 , 381 , 218 , 3238 , 1492 , 5202 , 30910 , 448082 , 718726 , 5888573 , 5551034 , 70084976 , 22923660 , 68936143 , 538655686 , 7161310087 , 9768085312
n×2
163379878
n×3
245069817
n×4
326759756
n×5
408449695
n÷2
40844969.5
n÷3
27229979.666667
n÷3
20422484.75
n÷5
16337987.8
n2
6673246133823721
n3
5.4513706960405E+23
n4
4.4532213962593E+31
n5
3.6378338421392E+39
2 √n9038.2486688517
3 √n433.8998739057
4 √n95.069704264038
5 √n38.232589543615
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
81689940 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
40844970 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
9038.2487241722 Returns the nth root of the product of n divisors
H Harmonic Mean
1.9999999755172 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81689939 can be divided by 2 positive divisors.
The sum of these divisors (counting 81689939) is 81689940, the average is 40844970.
Base
System
Value
2
Binary
100110111100111110101010011
3
Ternary
12200201021112022
4
Quaternary
10313213311103
5
Quinary
131403034224
6
Senary
12034522055
8
Octal
467476523
10
Decimal
81689939
12
Duodecimal
2343632b
16
Hexadecimal
4de7d53
20
Vigesimal
15ab4gj
36
Base36
1cmwcz
md5
6aa562687f0dc698f3c5e622807fd479
sha1
276c6c95481b7b6b6bf9b803099e28722b90c79d
sha256
f2cfc9c18c7b5757ab3867a71fbbf468786c5464620839e764b0245024fee780
sha512
0632437404f2233556b2b1c0475d1eebbfb535aa570c3db93121ff5072990f6589f6621bf9696a48c8b967b94bff399f33350db2f185fa6afa268000245816f7
ripemd-160
2b97d5b79e6f0c7944fa5e18b65c60a828547ab9
Diameter
163379878
Circumference
513273024.4692
Area
2.0964621029617E+16
Volume
2.2834648174234E+24
Surface area
8.3858484118468E+16
Circumference
513273024.4692
Perimeter
326759756
Area
6673246133823721
Diagonal
115527019.64323
Surface area
40039476802942326
Volume
5.4513706960405E+23
Space diagonal
141491124.8152
Perimeter
245069817
Area
2.8896003387988E+15
Altitude
70745562.407601
Surface area
2.8896003387988E+15
Volume
6.4245019765531E+22
Height
38509006.547744