81898981 (number)

81898981 is an odd 8-digits composite number following 81898980 and preceding 81898982. In scientific notation, it is written as 8.1898981 × 10^7. The sum of its digits is 52. It has a total of 2 prime factors and 4 positive divisors. There are 81088000 positive integers (up to 81898981) that are relatively prime to 81898981.

Interesting facts

Basic properties

Name

Name eighty-one million eight hundred ninety-eight thousand nine hundred eighty-one

Notation

Scientific notation 8.1898981 × 10^7
Engineering notation 8.1898981 × 10^6

Prime Factorization of 81898981

Prime Factorization 101 × 810881

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 81898981
Product of the distinct prime numbers

The prime factorization of 81898981 is 101 × 810881. Since it has a total of 2 prime factors.

Most popular turbo-numbers

4, 3, 67, 49, 976, 271, 7525, 6585, 10169, 62936, 567151, 659973, 6793581, 5418703, 86532847, 24732162, 398405893, 983281295, 4100215558, 6865470594

Basic calculations (n = 81898981)

Multiplication

n×y
n×2 163797962
n×3 245696943
n×4 327595924
n×5 409494905

Division

n÷y
n÷2 40949490.5
n÷3 27299660.333333
n÷3 20474745.25
n÷5 16379796.2

Exponentiation

ny
n2 6707443088838361
n3 5.4933275409135E+23
n4 4.4989792790005E+31
n5 3.6846181849026E+39

Nth Root

y√n
2√n 9049.8055780221
3√n 434.26967072274
4√n 95.130466087485
5√n 38.252136745842

Divisors of 81898981

1, 101, 810881, 81898981

4 divisors

τ Total Divisors 4
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81898980
Sum of the proper positive divisors of n
A Arithmetic Mean 0.25
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 4
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81898981 can be divided by 4 positive divisors. The sum of these divisors (counting 81898981) is 1, the average is 0.25.

Base conversion 81898981

Base System Value
2 Binary 100111000011010110111100101
3 Ternary 12201002220021121
4 Quaternary 10320122313211
5 Quinary 131431231411
6 Senary 12043213541
8 Octal 470326745
10 Decimal 81898981
12 Duodecimal 235172b1
16 Hexadecimal 4e1ade5
20 Vigesimal 15bh791
36 Base36 1crdnp

Cryptographic Hash Functions

md5 0376a7a10d17e241072aab302d40f2e2
sha1 000b7683417c1af57e2c6fb841c9dfe68468e4f6
sha256 8dfea6540f0367305e4da00496a96c58c6a3d6b6657b0984842d2ac67a85060f
sha512 1f4a66e68fa676d7ffb4aa72a04f736ad4f667bdf1fd005d6e3e819d5116226af455c115f206192c7684ff3763ab73cd6d3358ba9c8a6f21cfa38e82755dbbac
ripemd-160 641d0c42d3f7c5cf81f34b2d7a775fa150b1cba9

81898981 as geometric shapes

Circle

Radius = n
Diameter 163797962
Circumference 514586474.09218
Area 2.1072053932266E+16

Sphere

Radius = n
Volume 2.3010396595062E+24
Surface area 8.4288215729065E+16
Circumference 514586474.09218

Square

Length = n
Perimeter 327595924
Area 6707443088838361
Diagonal 115822649.67474

Cube

Length = n
Surface area 40244658533030166
Volume 5.4933275409135E+23
Space diagonal 141853196.18012

Equilateral Triangle

Length = n
Perimeter 245696943
Area 2.9044080546862E+15
Altitude 70926598.090059

Triangular Pyramid

Length = n
Surface area 2.9044080546862E+15
Volume 6.4739485924313E+22
Height 38607549.891579