77981421 is an odd 8-digits composite number following 77981420
and preceding 77981422 . In scientific notation, it is written as 7.7981421 × 10^7.
The sum of its digits is 39. It has a total of 3 prime factors and 8 positive divisors.
There are 43804848 positive integers (up to 77981421) that are relatively prime to 77981421.
77981421 has 8 divisors, whose sum is 89626560
The reverse of 77981421 is 12418977
Previous prime number is 7
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 39
Digital Root 3
Name
seventy-seven million nine hundred eighty-one thousand four hundred twenty-one
Scientific notation
7.7981421 × 10^7
Engineering notation
7.7981421 × 10^6
Prime Factorization
177 × 7 × 62939
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
77981421
Product of the distinct prime numbers
The prime factorization of 77981421 is 177 × 7 × 62939.
Since it has a total of 3 prime factors.
7 , 7 , 24 , 57 , 332 , 730 , 2955 , 4662 , 2495 , 33865 , 129873 , 921631 , 9096714 , 2983963 , 89537718 , 85724709 , 430706085 , 648325028 , 2309199399 , 5572380717
n×2
155962842
n×3
233944263
n×4
311925684
n×5
389907105
n÷2
38990710.5
n÷3
25993807
n÷3
19495355.25
n÷5
15596284.2
n2
6081102021179241
n3
4.7421297685753E+23
n4
3.697980179199E+31
n5
2.8837374920377E+39
2 √n
8830.7089749351
3 √n
427.23194166159
4 √n
93.971852035251
5 √n
37.878975908228
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
-77981420
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 77981421 can be divided by 8 positive divisors.
The sum of these divisors (counting 77981421) is 1, the average is 0.125.
Base
System
Value
2
Binary
100101001011110011011101101
3
Ternary
12102201212101210
4
Quaternary
10221132123231
5
Quinary
124430401141
6
Senary
11423225033
8
Octal
451363355
10
Decimal
77981421
12
Duodecimal
22148179
16
Hexadecimal
4a5e6ed
20
Vigesimal
1477db1
36
Base36
1afeul
md5
46486592d3af9631a0a7ba1559b19969
sha1
6de9c13ad7e4e0433a718c4edd190c2233e020a2
sha256
0b5e16cb0943515d9448ce06510888eaa9eea8c6271c7083e3bc8e9cc4c004f0
sha512
786329cc366ef24c1d9805d3b6ba565caa2ce3a8909f45cf54b1afd0f2e0d165714571f70921d607e69241c0bb523b0b09ae7d04b989ba2af225cce3a21b30ae
ripemd-160
3bd228865c867ae1458f57fde5a27204e0cdcd2a
Diameter
155962842
Circumference
489971718.66019
Area
1.9104345435467E+16
Volume
1.9863786724434E+24
Surface area
7.6417381741867E+16
Circumference
489971718.66019
Perimeter
311925684
Area
6081102021179241
Diagonal
110282383.19133
Surface area
36486612127075446
Volume
4.7421297685753E+23
Space diagonal
135067783.21842
Perimeter
233944263
Area
2.6331944166731E+15
Altitude
67533891.609209
Surface area
2.6331944166731E+15
Volume
5.5886535277103E+22
Height
36760794.397109