91997981 is an odd 8-digits composite number following 91997980
and preceding 91997982 . In scientific notation, it is written as 9.1997981 × 10^7.
The sum of its digits is 53. It has a total of 3 prime factors and 8 positive divisors.
There are 86761152 positive integers (up to 91997981) that are relatively prime to 91997981.
91997981 has 8 divisors, whose sum is 97278720
The reverse of 91997981 is 18979919
Previous prime number is 223
Is Prime? no
Number parity odd
Number length 8
Sum of Digits 53
Digital Root 8
Name
ninety-one million nine hundred ninety-seven thousand nine hundred eighty-one
Scientific notation
9.1997981 × 10^7
Engineering notation
9.1997981 × 10^6
Prime Factorization
19 × 223 × 21713
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
91997981
Product of the distinct prime numbers
The prime factorization of 91997981 is 19 × 223 × 21713.
Since it has a total of 3 prime factors.
6 , 5 , 12 , 58 , 386 , 110 , 4732 , 8244 , 73307 , 69302 , 523726 , 510761 , 6022719 , 6041995 , 83689382 , 3207291 , 590922302 , 308765578 , 7755831660 , 6437364945
n×2
183995962
n×3
275993943
n×4
367991924
n×5
459989905
n÷2
45998990.5
n÷3
30665993.666667
n÷3
22999495.25
n÷5
18399596.2
n2
8463628508076361
n3
7.7863673467707E+23
n4
7.1633007522723E+31
n5
6.5900920650483E+39
2 √n
9591.5577983975
3 √n
451.43244117264
4 √n
97.936498806101
5 √n
39.15215391166
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
-91997980
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 91997981 can be divided by 8 positive divisors.
The sum of these divisors (counting 91997981) is 1, the average is 0.125.
Base
System
Value
2
Binary
101011110111100011100011101
3
Ternary
20102002222111122
4
Quaternary
11132330130131
5
Quinary
142022413411
6
Senary
13043500325
8
Octal
536743435
10
Decimal
91997981
12
Duodecimal
269876a5
16
Hexadecimal
57bc71d
20
Vigesimal
18ejej1
36
Base36
1iru3h
md5
6e24bf667a4b5bb3a426baa2fa4dcf22
sha1
ac8611e3a5fe225ba74d0a6457df181033bfac42
sha256
22d851ee1f8858282082270ae2a4e204b339161aaf930318a15850489ba4d55b
sha512
2109656c095208fa7752e47a49e86b4d3a56ed028293cf72cb13539b592c583a5f8a6fd055194334e87c86bc8c9464aed08c1cd6bc8f2e6d46a14b0af951443f
ripemd-160
b4c856d7a9e4210da3f36a1d666418ae1dc362ba
Diameter
183995962
Circumference
578040362.50939
Area
2.6589273143686E+16
Volume
3.2615459273022E+24
Surface area
1.0635709257474E+17
Circumference
578040362.50939
Perimeter
367991924
Area
8463628508076361
Diagonal
130104792.44114
Surface area
50781771048458166
Volume
7.7863673467707E+23
Space diagonal
159345177.28576
Perimeter
275993943
Area
3.6648586480942E+15
Altitude
79672588.642878
Surface area
3.6648586480942E+15
Volume
9.1763219195184E+22
Height
43368264.147047