639863721 is an odd 9-digits composite number following 639863720
and preceding 639863722 . In scientific notation, it is written as 6.39863721 × 10^8.
The sum of its digits is 45. It has a total of 3 prime factors and 8 positive divisors.
There are 365394240 positive integers (up to 639863721) that are relatively prime to 639863721.
639863721 has 8 divisors, whose sum is 650450944
The reverse of 639863721 is 127368936
Previous prime number is 2287
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 45
Digital Root 9
Name
six hundred thirty-nine million eight hundred sixty-three thousand seven hundred twenty-one
Scientific notation
6.39863721 × 10^8
Engineering notation
6.39863721 × 10^6
Prime Factorization
63 × 2287 × 4441
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
639863721
Product of the distinct prime numbers
The prime factorization of 639863721 is 63 × 2287 × 4441.
Since it has a total of 3 prime factors.
5 , 9 , 24 , 59 , 726 , 725 , 4970 , 5716 , 33219 , 30040 , 385606 , 504554 , 2879081 , 8114975 , 43388120 , 24470922 , 421163444 , 227506271 , 7811222084 , 2947501584
n×2
1279727442
n×3
1919591163
n×4
2559454884
n×5
3199318605
n÷2
319931860.5
n÷3
213287907
n÷3
159965930.25
n÷5
127972744.2
n2
409425581451965841
n3
2.6197657602044E+26
n4
1.6762930674728E+35
n5
1.0725991196397E+44
2 √n
25295.527687716
3 √n
861.71270412792
4 √n
159.04567799131
5 √n
57.705538405679
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
-639863720
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 639863721 can be divided by 8 positive divisors.
The sum of these divisors (counting 639863721) is 1, the average is 0.125.
Base
System
Value
2
Binary
100110001000111000101110101001
3
Ternary
1122121000110000100
4
Quaternary
212020320232221
5
Quinary
2302301114341
6
Senary
143254300013
8
Octal
4610705651
10
Decimal
639863721
12
Duodecimal
15a357609
16
Hexadecimal
26238ba9
20
Vigesimal
9jj2j61
36
Base36
akyi09
md5
9dafdd297bc1bf91881fb1768f8730b2
sha1
92553d4f28d63f77f11f9cf8cc9e8333d7d945e1
sha256
136c5dd565262a66c920539fb35a39a2a98fda671bbf8bd5fae9a6ad0d574df6
sha512
be55ff026318c06e48e3fc4a870c0d515d369edbda6b35e536dc0d0007ec4d37c082cc54acb228d68d2af0ef3562482c976cfcaaa29771b5167d59fd86ca8af3
ripemd-160
8a830a5b75013b94175940d7bbe7da22146360a0
Diameter
1279727442
Circumference
4020382330.3845
Area
1.2862483988812E+18
Volume
1.0973649155179E+27
Surface area
5.1449935955249E+18
Circumference
4020382330.3845
Perimeter
2559454884
Area
409425581451965841
Diagonal
904903952.30871
Surface area
2456553488711795046
Volume
2.6197657602044E+26
Space diagonal
1108276474.6921
Perimeter
1919591163
Area
1.7728647724831E+17
Altitude
554138237.34604
Surface area
1.7728647724831E+17
Volume
3.0874235569348E+25
Height
301634650.76957