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

81686721 (number)

81686721 is an odd 8-digits composite number following 81686720 and preceding 81686722. In scientific notation, it is written as 8.1686721 × 10^7. The sum of its digits is 39. It has a total of 3 prime factors and 8 positive divisors. There are 54375552 positive integers (up to 81686721) that are relatively prime to 81686721.

Interesting facts

81686721 has 8 divisors, whose sum is 109080160
The reverse of 81686721 is 12768618
Previous prime number is 673

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 39
Digital Root 3

Name

Name	eighty-one million six hundred eighty-six thousand seven hundred twenty-one

Notation

Scientific notation	8.1686721 × 10^7
Engineering notation	8.1686721 × 10^6

Prime Factorization of 81686721

Prime Factorization 3 × 673 × 40459

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81686721	Product of the distinct prime numbers

The prime factorization of 81686721 is 3 × 673 × 40459. Since it has a total of 3 prime factors.

Most popular turbo-numbers

9, 9, 18, 24, 875, 548, 3181, 5805, 59878, 86100, 569973, 485910, 1340598, 9926462, 27284487, 87730181, 298811659, 43369576, 8888561724, 7270063066

Basic calculations (n = 81686721)

Multiplication

n×y

n×2	163373442
n×3	245060163
n×4	326746884
n×5	408433605

Division

n÷y

n÷2	40843360.5
n÷3	27228907
n÷3	20421680.25
n÷5	16337344.2

Exponentiation

n^y

n²	6672720387731841
n³	5.4507264862366E+23
n⁴	4.4525197372852E+31
n⁵	3.6371173752661E+39

Nth Root

^y√n

²√n	9038.0706458846
³√n	433.89417631248
⁴√n	95.068767983416
⁵√n	38.23228832069

Divisors of 81686721

1, 3, 673, 2019, 40459, 121377, 27228907, 81686721

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	-81686720	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 81686721 can be divided by 8 positive divisors. The sum of these divisors (counting 81686721) is 1, the average is 0.125.

Base conversion 81686721

Base	System	Value
2	Binary	100110111100111000011000001
3	Ternary	12200201010010010
4	Quaternary	10313213003001
5	Quinary	131402433341
6	Senary	12034455133
8	Octal	467470301
10	Decimal	81686721
12	Duodecimal	234344a9
16	Hexadecimal	4de70c1
20	Vigesimal	15aagg1
36	Base36	1cmtvl

Cryptographic Hash Functions

md5	70a8886e9c2f75395bdd2e27edb14838
sha1	37e82bbb5105748773086c7c74f03aed50f38bbf
sha256	0d8b42b1ad66d3f0d8e6135d8598a4873e0f6aea2a960b8a3a0a9141d4519398
sha512	f395991a7fa79646b7d23ccf83dbe08c9c955b9dba2ebfb22ead3c2955a36f9c75daa983d577584490c5e40baa29ad889dff7d4c8422d95c858a344401eb4100
ripemd-160	e95d3a5a52cf87e8d829af7fde36ede49f4432a4

81686721 as geometric shapes

Circle

Radius = n

Diameter	163373442
Circumference	513252805.17888
Area	2.0962969349557E+16

Sphere

Radius = n

Volume	2.2831949714518E+24
Surface area	8.3851877398229E+16
Circumference	513252805.17888

Square

Length = n

Perimeter	326746884
Area	6672720387731841
Diagonal	115522468.70399

Cube

Length = n

Surface area	40036322326391046
Volume	5.4507264862366E+23
Space diagonal	141485551.0757

Equilateral Triangle

Length = n

Perimeter	245060163
Area	2.8893726840631E+15
Altitude	70742775.537852

Triangular Pyramid

Length = n

Surface area	2.8893726840631E+15
Volume	6.4237427680184E+22
Height	38507489.567996