81397943 is an odd 8-digits composite number following 81397942
and preceding 81397944 . In scientific notation, it is written as 8.1397943 × 10^7.
The sum of its digits is 44. It has a total of 3 prime factors and 8 positive divisors.
There are 70371840 positive integers (up to 81397943) that are relatively prime to 81397943.
81397943 has 8 divisors, whose sum is 82192368
The reverse of 81397943 is 34979318
Previous prime number is 193
Is Prime? no Number parity odd Number length 8 Sum of Digits 44 Digital Root 8
Name
eighty-one million three hundred ninety-seven thousand nine hundred forty-three
Scientific notation
8.1397943 × 10^7
Engineering notation
8.1397943 × 10^6
Prime Factorization
253 × 193 × 1667
Composite number
ω Distinct Factors
3 Total number of distinct prime factors
Ω Total Factors
3 Total number of prime factors
rad Radical
81397943 Product of the distinct prime numbers
The prime factorization of 81397943 is 253 × 193 × 1667.
Since it has a total of 3 prime factors.
7 , 5 , 18 , 46 , 448 , 378 , 7493 , 2023 , 79350 , 5320 , 723072 , 301368 , 2910628 , 6956063 , 78899454 , 48165143 , 988358276 , 972441393 , 7907095187 , 4233840633
n×2
162795886
n×3
244193829
n×4
325591772
n×5
406989715
n÷2
40698971.5
n÷3
27132647.666667
n÷3
20349485.75
n÷5
16279588.6
n2
6625625124631249
n3
5.393122562341E+23
n4
4.3898908292145E+31
n5
3.5732808349262E+39
2 √n9022.0808575406
3 √n433.38227330231
4 √n94.984634849751
5 √n38.205218341324
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
-81397942 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 81397943 can be divided by 8 positive divisors.
The sum of these divisors (counting 81397943) is 1, the average is 0.125.
Base
System
Value
2
Binary
100110110100000100010110111
3
Ternary
12200011102222122
4
Quaternary
10312200202313
5
Quinary
131314213233
6
Senary
12024350155
8
Octal
466404267
10
Decimal
81397943
12
Duodecimal
2331535b
16
Hexadecimal
4da08b7
20
Vigesimal
158eeh3
36
Base36
1cgn1z
md5
44bf4a9eec5a3786daad0cc02dc4fa95
sha1
de967a8f07a55bd9bc9e87b14df9fb9274e4b304
sha256
0f53aee680ad7455c8e5ed609bbe70d9f51b2eac823161a03bf0b0503f060ed9
sha512
3f48f19dd30525164dba2075eaa5fcc8e0ef8f941b52fe3b56fb6e196db959e738a1990f61f6f248c0b52a05f00b295eeb9a3e29c67b40e75549eab03dccc78e
ripemd-160
cf6917a781f906a53b50242a3d74b3c40c489281
Diameter
162795886
Circumference
511438359.49224
Area
2.0815015216981E+16
Volume
2.2590658962347E+24
Surface area
8.3260060867926E+16
Circumference
511438359.49224
Perimeter
325591772
Area
6625625124631249
Diagonal
115114074.93987
Surface area
39753750747787494
Volume
5.393122562341E+23
Space diagonal
140985372.9076
Perimeter
244193829
Area
2.8689798369415E+15
Altitude
70492686.453798
Surface area
2.8689798369415E+15
Volume
6.3558558926692E+22
Height
38371358.313291