81793989 is an odd 8-digits composite number following 81793988
and preceding 81793990 . In scientific notation, it is written as 8.1793989 × 10^7.
The sum of its digits is 54. It has a total of 5 prime factors and 16 positive divisors.
There are 53965440 positive integers (up to 81793989) that are relatively prime to 81793989.
81793989 has 16 divisors, whose sum is 122429440
The reverse of 81793989 is 98939718
Previous prime number is 97
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 54
Digital Root 9
Name
eighty-one million seven hundred ninety-three thousand nine hundred eighty-nine
Scientific notation
8.1793989 × 10^7
Engineering notation
8.1793989 × 10^6
Prime Factorization
3 × 3 × 3 × 97 × 31231
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
5
Total number of prime factors
rad
Radical
9088221
Product of the distinct prime numbers
The prime factorization of 81793989 is 3 × 3 × 3 × 97 × 31231.
Since it has a total of 5 prime factors.
2 , 1 , 71 , 80 , 298 , 906 , 3445 , 4852 , 60300 , 4993 , 297079 , 107313 , 2490897 , 7716771 , 80327288 , 66382154 , 765603091 , 353795086 , 9386342476 , 6895998131
n×2
163587978
n×3
245381967
n×4
327175956
n×5
408969945
n÷2
40896994.5
n÷3
27264663
n÷3
20448497.25
n÷5
16358797.8
n2
6690256636532121
n3
5.4722277773569E+23
n4
4.4759533862662E+31
n5
3.6610608204077E+39
2 √n
9044.0029301189
3 √n
434.08401786791
4 √n
95.09996282922
5 √n
38.242324097822
1 , 3 , 9 , 27 , 97 , 291 , 873 , 2619 , 31231 , 93693 , 281079 , 843237 , 3029407 , 9088221 , 27264663 , 81793989
16 divisors
τ
Total Divisors
16
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-81793988
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.0625
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
16
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81793989 can be divided by 16 positive divisors.
The sum of these divisors (counting 81793989) is 1, the average is 0.0625.
Base
System
Value
2
Binary
100111000000001001111000101
3
Ternary
12200220120021000
4
Quaternary
10320001033011
5
Quinary
131414401424
6
Senary
12041043513
8
Octal
470011705
10
Decimal
81793989
12
Duodecimal
23486599
16
Hexadecimal
4e013c5
20
Vigesimal
15b44j9
36
Base36
1cp4n9
md5
99bbcd373edd5ddcc30a85b529f7d157
sha1
71f52dc69ecdcb4a592d8475d6ef7dee84bf176c
sha256
6154ab8eab5320297f4d4b925bf84198e7471130668b94f58c4b26565b3cc97a
sha512
5bba6ad3db44d85643bb69b9bd33ae91c6134345aa5a5f6a971700be4c9aeff5503d5dfe30a8626d380ddf94257059bec73241309e3851251836dfd62647fa58
ripemd-160
f2810460e227527938b81cec42d8be2aaa9c9777
Diameter
163587978
Circumference
513926789.90041
Area
2.101806109996E+16
Volume
2.2922014112152E+24
Surface area
8.4072244399839E+16
Circumference
513926789.90041
Perimeter
327175956
Area
6690256636532121
Diagonal
115674168.5644
Surface area
40141539819192726
Volume
5.4722277773569E+23
Space diagonal
141671344.70173
Perimeter
245381967
Area
2.8969661025371E+15
Altitude
70835672.350865
Surface area
2.8969661025371E+15
Volume
6.4490822826107E+22
Height
38558056.188132