639943721 is an odd 9-digits composite number following 639943720
and preceding 639943722 . In scientific notation, it is written as 6.39943721 × 10^8.
The sum of its digits is 44. It has a total of 2 prime factors and 4 positive divisors.
There are 639443652 positive integers (up to 639943721) that are relatively prime to 639943721.
639943721 has 4 divisors, whose sum is 640443792
The reverse of 639943721 is 127349936
Previous prime number is 1283
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 44
Digital Root 8
Name
six hundred thirty-nine million nine hundred forty-three thousand seven hundred twenty-one
Scientific notation
6.39943721 × 10^8
Engineering notation
6.39943721 × 10^6
Prime Factorization
1283 × 498787
Composite number
ω
Distinct Factors
2
Total number of distinct prime factors
Ω
Total Factors
2
Total number of prime factors
rad
Radical
639943721
Product of the distinct prime numbers
The prime factorization of 639943721 is 1283 × 498787.
Since it has a total of 2 prime factors.
6 , 2 , 27 , 52 , 698 , 392 , 1631 , 5715 , 23517 , 29187 , 451482 , 574614 , 6308866 , 1665171 , 91778487 , 6637891 , 349229460 , 599784639 , 7418962200 , 4919152060
n×2
1279887442
n×3
1919831163
n×4
2559774884
n×5
3199718605
n÷2
319971860.5
n÷3
213314573.66667
n÷3
159985930.25
n÷5
127988744.2
n2
409527966047325841
n3
2.6207485044589E+26
n4
1.6771315497486E+35
n5
1.0732698045526E+44
2 √n
25297.10894549
3 √n
861.74861497439
4 √n
159.05064899424
5 √n
57.706981279237
4 divisors
τ
Total Divisors
4
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-639943720
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.25
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
4
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 639943721 can be divided by 4 positive divisors.
The sum of these divisors (counting 639943721) is 1, the average is 0.25.
Base
System
Value
2
Binary
100110001001001100010000101001
3
Ternary
1122121011111202022
4
Quaternary
212021030100221
5
Quinary
2302311144341
6
Senary
143300114225
8
Octal
4611142051
10
Decimal
639943721
12
Duodecimal
15a395975
16
Hexadecimal
2624c429
20
Vigesimal
9jjcj61
36
Base36
al07qh
md5
fe0121ad1374050064671bd9e941122c
sha1
05ef3e7a1cbe955ef7f9c94192e7210102145788
sha256
7981ae59270c1da9693a7a99d30a615dc3fb399afa42c8d0491baf6acc08e2c8
sha512
3a7bbe1c22c7339f53764c20a4e47eca0d61aa8da8884eaf764c8094727b5ff38e5d4df9cb9860c51954d683aa9e8a46c1614e4185d114f9866b46e7b6274306
ripemd-160
402d693d15f778a6fb1f702c9efd92676f8a4709
Diameter
1279887442
Circumference
4020884985.209
Area
1.2865700495738E+18
Volume
1.0977765664686E+27
Surface area
5.1462801982954E+18
Circumference
4020884985.209
Perimeter
2559774884
Area
409527966047325841
Diagonal
905017089.3937
Surface area
2457167796283955046
Volume
2.6207485044589E+26
Space diagonal
1108415038.7567
Perimeter
1919831163
Area
1.7733081107858E+17
Altitude
554207519.37834
Surface area
1.7733081107858E+17
Volume
3.0885817321456E+25
Height
301672363.13123