81386989 is an odd 8-digits prime number following 81386988
and preceding 81386990 . In scientific notation, it is written as 8.1386989 × 10^7.
The sum of its digits is 52. It has a total of 1 prime factors and 2 positive divisors.
There are 81386988 positive integers (up to 81386989) that are relatively prime to 81386989.
81386989 has 2 divisors, whose sum is 81386990
The reverse of 81386989 is 98968318
Previous prime number is 1
Is Prime? yes Number parity odd Number length 8 Sum of Digits 52 Digital Root 7
Name
eighty-one million three hundred eighty-six thousand nine hundred eighty-nine
Scientific notation
8.1386989 × 10^7
Engineering notation
8.1386989 × 10^6
Prime Factorization
81386989
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
81386989 Product of the distinct prime numbers
The prime factorization of 81386989 is 81386989.
Since it has a total of 1 prime factors.
1 , 7 , 92 , 40 , 460 , 307 , 1132 , 6370 , 77079 , 1139 , 334753 , 78830 , 3447304 , 9413915 , 45971845 , 61800372 , 683230414 , 657597903 , 1944186127 , 9030071833
n×2
162773978
n×3
244160967
n×4
325547956
n×5
406934945
n÷2
40693494.5
n÷3
27128996.333333
n÷3
20346747.25
n÷5
16277397.8
n2
6623841978486121
n3
5.3909455424079E+23
n4
4.3875282555955E+31
n5
3.5708771387534E+39
2 √n9021.4737709534
3 √n433.36283185119
4 √n94.981439086557
5 √n38.204190004549
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
81386990 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
40693495 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
9021.4738263767 Returns the nth root of the product of n divisors
H Harmonic Mean
1.999999975426 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81386989 can be divided by 2 positive divisors.
The sum of these divisors (counting 81386989) is 81386990, the average is 40693495.
Base
System
Value
2
Binary
100110110011101110111101101
3
Ternary
12200010212221221
4
Quaternary
10312131313231
5
Quinary
131313340424
6
Senary
12024223341
8
Octal
466356755
10
Decimal
81386989
12
Duodecimal
2330ab51
16
Hexadecimal
4d9dded
20
Vigesimal
158d799
36
Base36
1cgelp
md5
a4f5373ffbbb29204e02874f42595c2f
sha1
3df2527a87a3c6e7a38ded8350dc60a5b3811c93
sha256
cdf8c66b8d3f21879c6319332eea4962c323791ff252fa8d92c57d2b19c55dd5
sha512
7d4018409a16cc6fc63670663590ac91ee4a93a3dca7e941dbbc3007968b0558965303e53e1cd39a9bede5ba03856157fb0c7882e03e5e01d8a7b25bc7128805
ripemd-160
ea408a89010874d47ae97e17939b3d5105637ce0
Diameter
162773978
Circumference
511369533.48039
Area
2.0809413298152E+16
Volume
2.2581539882575E+24
Surface area
8.3237653192607E+16
Circumference
511369533.48039
Perimeter
325547956
Area
6623841978486121
Diagonal
115098583.64451
Surface area
39743051870916726
Volume
5.3909455424079E+23
Space diagonal
140966400.02305
Perimeter
244160967
Area
2.8682077120114E+15
Altitude
70483200.011525
Surface area
2.8682077120114E+15
Volume
6.3532902500733E+22
Height
38366194.54817