68638981 is an odd 8-digits prime number following 68638980
and preceding 68638982 . In scientific notation, it is written as 6.8638981 × 10^7.
The sum of its digits is 49. It has a total of 1 prime factors and 2 positive divisors.
There are 68638980 positive integers (up to 68638981) that are relatively prime to 68638981.
68638981 has 2 divisors, whose sum is 68638982
The reverse of 68638981 is 18983686
Previous prime number is 1
Is Prime? yes Number parity odd Number length 8 Sum of Digits 49 Digital Root 4
Name
sixty-eight million six hundred thirty-eight thousand nine hundred eighty-one
Scientific notation
6.8638981 × 10^7
Engineering notation
6.8638981 × 10^6
Prime Factorization
68638981
Composite number
ω Distinct Factors
1 Total number of distinct prime factors
Ω Total Factors
1 Total number of prime factors
rad Radical
68638981 Product of the distinct prime numbers
The prime factorization of 68638981 is 68638981.
Since it has a total of 1 prime factors.
6 , 4 , 87 , 5 , 616 , 621 , 8490 , 3916 , 41154 , 19581 , 864294 , 998843 , 8638877 , 4327907 , 36259854 , 4255409 , 661112770 , 6232790 , 9444024690 , 4220708202
n×2
137277962
n×3
205916943
n×4
274555924
n×5
343194905
n÷2
34319490.5
n÷3
22879660.333333
n÷3
17159745.25
n÷5
13727796.2
n2
4711309712718361
n3
3.2337949785639E+23
n4
2.2196439209154E+31
n5
1.5235409691448E+39
2 √n8284.8645734254
3 √n409.44000685515
4 √n91.021231443139
5 √n36.924461086331
2 divisors
τ Total Divisors
2 Total number of the positive divisors of n
σ Sum of Divisors
68638982 Sum of all the positive divisors of n
s Aliquot Sum
1 Sum of the proper positive divisors of n
A Arithmetic Mean
34319491 Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G Geometric Mean
8284.8646337765 Returns the nth root of the product of n divisors
H Harmonic Mean
1.999999970862 Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 68638981 can be divided by 2 positive divisors.
The sum of these divisors (counting 68638981) is 68638982, the average is 34319491.
Base
System
Value
2
Binary
100000101110101100100000101
3
Ternary
11210011012222111
4
Quaternary
10011311210011
5
Quinary
120032421411
6
Senary
10451101021
8
Octal
405654405
10
Decimal
68638981
12
Duodecimal
1aba1771
16
Hexadecimal
4175905
20
Vigesimal
118jh91
36
Base36
14v66d
md5
19565c5873771137c26320aacac6d40a
sha1
b00de521ab4ac8f5a200d6c4c110d2e9657c5bb7
sha256
4cf1fc1d45def79c340e67b10cd4b001c4f7bc98f1d2e9324d8b67d628dc83cf
sha512
990cbd5c5fff69d9394dbe967e1d43304b4a6cd3345830faea41b93653f2792cc5d261fc40808aad0a281e50818839ece4882ae6d6a743c01fdddf7db69c57ba
ripemd-160
e39cdca28bec0a4da52215215ec6a9f1671f461b
Diameter
137277962
Circumference
431271436.91898
Area
1.4801015982262E+16
Volume
1.3545688730496E+24
Surface area
5.9204063929049E+16
Circumference
431271436.91898
Perimeter
274555924
Area
4711309712718361
Diagonal
97070177.837669
Surface area
28267858276310166
Volume
3.2337949785639E+23
Space diagonal
118886202.47175
Perimeter
205916943
Area
2.0400569481552E+15
Altitude
59443101.235877
Surface area
2.0400569481552E+15
Volume
3.8110639305159E+22
Height
32356725.94589