81491623 is an odd 8-digits prime number following 81491622
and preceding 81491624 . In scientific notation, it is written as 8.1491623 × 10^7.
The sum of its digits is 34. It has a total of 1 prime factors and 2 positive divisors.
There are 81491622 positive integers (up to 81491623) that are relatively prime to 81491623.
81491623 has 2 divisors, whose sum is 81491624
The reverse of 81491623 is 32619418
Previous prime number is 1
Is Prime? yes Number parity odd Number length 8 Sum of Digits 34 Digital Root 7
Name
eighty-one million four hundred ninety-one thousand six hundred twenty-three
Scientific notation
8.1491623 × 10^7
Engineering notation
8.1491623 × 10^6
Prime Factorization
81491623
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
81491623 Product of the distinct prime numbers
The prime factorization of 81491623 is 81491623.
Since it has a total of 1 prime factors.
3 , 1 , 11 , 16 , 583 , 460 , 8315 , 8253 , 71371 , 14697 , 763774 , 937085 , 2193756 , 2229969 , 3438027 , 67475041 , 702561122 , 676798602 , 2595488581 , 2658397799
n×2
162983246
n×3
244474869
n×4
325966492
n×5
407458115
n÷2
40745811.5
n÷3
27163874.333333
n÷3
20372905.75
n÷5
16298324.6
n2
6640884619174129
n3
5.4117646577224E+23
n4
4.4101348525184E+31
n5
3.5938904678059E+39
2 √n9027.2710715919
3 √n433.54846786342
4 √n95.011952256502
5 √n38.214008289121
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
81491624 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
40745812 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
9027.2711269796 Returns the nth root of the product of n divisors
H Harmonic Mean
1.9999999754576 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81491623 can be divided by 2 positive divisors.
The sum of these divisors (counting 81491623) is 81491624, the average is 40745812.
Base
System
Value
2
Binary
100110110110111011010100111
3
Ternary
12200100012111021
4
Quaternary
10312313122213
5
Quinary
131330212443
6
Senary
12030352011
8
Octal
466673247
10
Decimal
81491623
12
Duodecimal
2335b607
16
Hexadecimal
4db76a7
20
Vigesimal
1596913
36
Base36
1cinc7
md5
3296a1e440ad37ee34cdf0aef0634c32
sha1
7de075452ed725c3b0d831ec93abf221a38db241
sha256
e82e43e65c436821510f92e759348204e13855960339ac878608c719e339be6b
sha512
c5983dfb5990b7573caa161fc26676880c419b14c93e68b770ccc62f5e79c97247349d12afd560f693b128db99318960e9ef9be7e3c57779fa451d5fa33514a2
ripemd-160
42bc1d7d2faf808e80715c915b5fa8cb55b180c8
Diameter
162983246
Circumference
512026968.29182
Area
2.0862954332935E+16
Volume
2.2668746788877E+24
Surface area
8.345181733174E+16
Circumference
512026968.29182
Perimeter
325966492
Area
6640884619174129
Diagonal
115246558.4664
Surface area
39845307715044774
Volume
5.4117646577224E+23
Space diagonal
141147631.42725
Perimeter
244474869
Area
2.8755873919031E+15
Altitude
70573815.713624
Surface area
2.8755873919031E+15
Volume
6.3778258127686E+22
Height
38415519.488798