Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

81994865 (number)

81994865 is an odd 8-digits composite number following 81994864 and preceding 81994866. In scientific notation, it is written as 8.1994865 × 10^7. The sum of its digits is 50. It has a total of 3 prime factors and 8 positive divisors. There are 65094640 positive integers (up to 81994865) that are relatively prime to 81994865.

Interesting facts

81994865 has 8 divisors, whose sum is 99145728
The reverse of 81994865 is 56849918
Previous prime number is 131

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 50
Digital Root 5

Name

Name	eighty-one million nine hundred ninety-four thousand eight hundred sixty-five

Notation

Scientific notation	8.1994865 × 10^7
Engineering notation	8.1994865 × 10^6

Prime Factorization of 81994865

Prime Factorization 5 × 131 × 125183

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81994865	Product of the distinct prime numbers

The prime factorization of 81994865 is 5 × 131 × 125183. Since it has a total of 3 prime factors.

Most popular turbo-numbers

7, 4, 74, 7, 255, 5, 6182, 8468, 3850, 68426, 207406, 133594, 6506644, 5887827, 32539110, 69570142, 674883183, 963554325, 1106547013, 1233718467

Basic calculations (n = 81994865)

Multiplication

n×y

n×2	163989730
n×3	245984595
n×4	327979460
n×5	409974325

Division

n÷y

n÷2	40997432.5
n÷3	27331621.666667
n÷3	20498716.25
n÷5	16398973

Exponentiation

n^y

n²	6723157886368225
n³	5.5126442326645E+23
n⁴	4.5200851965035E+31
n⁵	3.7062377547581E+39

Nth Root

^y√n

²√n	9055.1016007552
³√n	434.43907972397
⁴√n	95.158297592776
⁵√n	38.261089363839

Divisors of 81994865

1, 5, 131, 655, 125183, 625915, 16398973, 81994865

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	-81994864	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 81994865 can be divided by 8 positive divisors. The sum of these divisors (counting 81994865) is 1, the average is 0.125.

Base conversion 81994865

Base	System	Value
2	Binary	100111000110010010001110001
3	Ternary	12201021202210212
4	Quaternary	10320302101301
5	Quinary	131442313430
6	Senary	12045233505
8	Octal	470622161
10	Decimal	81994865
12	Duodecimal	23562895
16	Hexadecimal	4e32471
20	Vigesimal	15c9735
36	Base36	1ctfn5

Cryptographic Hash Functions

md5	b2a682d68223d865d4a1f0ead50c4caf
sha1	2765eb15083ce8dce2a49810b8433146ac0bf7d7
sha256	eb65cb12f4d0bfc1fab9843f7df6e9f268b6a4a66969dd967840a099a1740113
sha512	a98854f4aad5bd0859b4c000ed4371d3f41e3c39c29532d2f5e2431dee6614499baf776f7adc78b1cc73acdc8fdf03e73e5edf8e2b3dc6454029e9f29efa9ba2
ripemd-160	c3ddbfebb7f403ae9aad8f9992cea24c2e71c15c

81994865 as geometric shapes

Circle

Radius = n

Diameter	163989730
Circumference	515188931.03217
Area	2.1121423424739E+16

Sphere

Radius = n

Volume	2.3091310164257E+24
Surface area	8.4485693698955E+16
Circumference	515188931.03217

Square

Length = n

Perimeter	327979460
Area	6723157886368225
Diagonal	115958250.12795

Cube

Length = n

Surface area	40338947318209350
Volume	5.5126442326645E+23
Space diagonal	142019272.13975

Equilateral Triangle

Length = n

Perimeter	245984595
Area	2.9112127616243E+15
Altitude	71009636.069876

Triangular Pyramid

Length = n

Surface area	2.9112127616243E+15
Volume	6.4967135319766E+22
Height	38652750.04265