643640981 (number)

643640981 is an odd 9-digits prime number following 643640980 and preceding 643640982. In scientific notation, it is written as 6.43640981 × 10^8. The sum of its digits is 41. It has a total of 1 prime factors and 2 positive divisors. There are 643640980 positive integers (up to 643640981) that are relatively prime to 643640981.

Interesting facts

Basic properties

Name

Name six hundred forty-three million six hundred forty thousand nine hundred eighty-one

Notation

Scientific notation 6.43640981 × 10^8
Engineering notation 6.43640981 × 10^6

Prime Factorization of 643640981

Prime Factorization 643640981

Composite number
ω Distinct Factors 1
Total number of distinct prime factors
Ω Total Factors 1
Total number of prime factors
rad Radical 643640981
Product of the distinct prime numbers

The prime factorization of 643640981 is 643640981. Since it has a total of 1 prime factors.

Most popular turbo-numbers

2, 7, 43, 3, 655, 906, 6769, 8282, 25746, 98742, 520835, 298560, 3429399, 3541644, 3032458, 18034280, 233407806, 627997295, 643987156, 6739637526

Basic calculations (n = 643640981)

Multiplication

n×y
n×2 1287281962
n×3 1930922943
n×4 2574563924
n×5 3218204905

Division

n÷y
n÷2 321820490.5
n÷3 214546993.66667
n÷3 160910245.25
n÷5 128728196.2

Exponentiation

ny
n2 414273712422642361
n3 2.6664353866622E+26
n4 1.7162270880444E+35
n5 1.1046340865677E+44

Nth Root

y√n
2√n 25370.080429514
3√n 863.4050066794
4√n 159.27988080581
5√n 57.773507863139

Divisors of 643640981

1, 643640981

2 divisors

τ Total Divisors 2
Total number of the positive divisors of n
σ Sum of Divisors 643640982
Sum of all the positive divisors of n
s Aliquot Sum 1
Sum of the proper positive divisors of n
A Arithmetic Mean 321820491
Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G Geometric Mean 25370.080449222
Returns the nth root of the product of n divisors
H Harmonic Mean 1.9999999968927
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 643640981 can be divided by 2 positive divisors. The sum of these divisors (counting 643640981) is 643640982, the average is 321820491.

Base conversion 643640981

Base System Value
2 Binary 100110010111010010111010010101
3 Ternary 1122212010100102212
4 Quaternary 212113102322111
5 Quinary 2304233002411
6 Senary 143511243205
8 Octal 4627227225
10 Decimal 643640981
12 Duodecimal 15b679505
16 Hexadecimal 265d2e95
20 Vigesimal a12f291
36 Base36 an7gk5

Cryptographic Hash Functions

md5 b434220ead71b66448541b5379fbbdb0
sha1 6e6bae9296b8b4309cd6ea86f1cec8b987d34c27
sha256 dbdba85366fba3afaab6822710ad41e58da1ef4c5a94ee557a98c7da986c0c39
sha512 7ec3c63513027b11f4af57be60030acc3c9231218efaa0f6cba9eb8588df99cd9e1bc89eb7c9694a26d0fe34de5d3da2e432c29004fcb1df70608decf394b239
ripemd-160 b53de3be484156d218d27134715d38cf67d769b8

643640981 as geometric shapes

Circle

Radius = n
Diameter 1287281962
Circumference 4044115554.9179
Area 1.3014792515223E+18

Sphere

Radius = n
Volume 1.1169138429346E+27
Surface area 5.2059170060894E+18
Circumference 4044115554.9179

Square

Length = n
Perimeter 2574563924
Area 414273712422642361
Diagonal 910245804.62932

Cube

Length = n
Surface area 2485642274535854166
Volume 2.6664353866622E+26
Space diagonal 1114818880.9255

Equilateral Triangle

Length = n
Perimeter 1930922943
Area 1.7938577953905E+17
Altitude 557409440.46274

Triangular Pyramid

Length = n
Surface area 1.7938577953905E+17
Volume 3.1424242391744E+25
Height 303415268.20977