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

81681091 (number)

81681091 is an odd 8-digits prime number following 81681090 and preceding 81681092. In scientific notation, it is written as 8.1681091 × 10^7. The sum of its digits is 34. It has a total of 1 prime factors and 2 positive divisors. There are 81681090 positive integers (up to 81681091) that are relatively prime to 81681091.

Interesting facts

81681091 has 2 divisors, whose sum is 81681092
The reverse of 81681091 is 19018618
Previous prime number is 1

Basic properties

Is Prime? yes
Number parity odd
Number length 8
Sum of Digits 34
Digital Root 7

Name

Name	eighty-one million six hundred eighty-one thousand ninety-one

Notation

Scientific notation	8.1681091 × 10^7
Engineering notation	8.1681091 × 10^6

Prime Factorization of 81681091

Prime Factorization 81681091

Composite number

ω	Distinct Factors	1	Total number of distinct prime factors
Ω	Total Factors	1	Total number of prime factors
rad	Radical	81681091	Product of the distinct prime numbers

The prime factorization of 81681091 is 81681091. Since it has a total of 1 prime factors.

Most popular turbo-numbers

9, 2, 83, 89, 138, 683, 5189, 893, 68509, 43665, 2286, 896211, 7515833, 5581891, 16346981, 94210935, 575611236, 446299739, 3685419001, 1027059616

Basic calculations (n = 81681091)

Multiplication

n×y

n×2	163362182
n×3	245043273
n×4	326724364
n×5	408405455

Division

n÷y

n÷2	40840545.5
n÷3	27227030.333333
n÷3	20420272.75
n÷5	16336218.2

Exponentiation

n^y

n²	6671800626950281
n³	5.4495995414378E+23
n⁴	4.4512923605774E+31
n⁵	3.6358641637193E+39

Nth Root

^y√n

²√n	9037.7591802393
³√n	433.88420782023
⁴√n	95.067129862215
⁵√n	38.231761298145

Divisors of 81681091

1, 81681091

2 divisors

τ	Total Divisors	2	Total number of the positive divisors of n
σ	Sum of Divisors	81681092	Sum of all the positive divisors of n
s	Aliquot Sum	1	Sum of the proper positive divisors of n
A	Arithmetic Mean	40840546	Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G	Geometric Mean	9037.7592355628	Returns the nth root of the product of n divisors
H	Harmonic Mean	1.9999999755145	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81681091 can be divided by 2 positive divisors. The sum of these divisors (counting 81681091) is 81681092, the average is 40840546.

Base conversion 81681091

Base	System	Value
2	Binary	100110111100101101011000011
3	Ternary	12200200211101121
4	Quaternary	10313211223003
5	Quinary	131402243331
6	Senary	12034413111
8	Octal	467455303
10	Decimal	81681091
12	Duodecimal	23431197
16	Hexadecimal	4de5ac3
20	Vigesimal	15aa2eb
36	Base36	1cmpj7

Cryptographic Hash Functions

md5	f7fe5724f78f5628ce01319f529c4391
sha1	036b43315bada979ee4251efb06bec9df797eb19
sha256	36b8ac19a4194455119600f3960ff34225dd6861dbae3a7c477ad836ca89c065
sha512	5f53c82ed92d7cb7832d2497be71e1c2625333f4415390651587297d3da3e3b8fe6f46e4c08213e8c096a3a90bb10cb50f4528d67c1277ba7ab56240eeb242bc
ripemd-160	baf875e82a77ff23b97573fb5f89a49515425f28

81681091 as geometric shapes

Circle

Radius = n

Diameter	163362182
Circumference	513217430.8456
Area	2.0960079835843E+16

Sphere

Radius = n

Volume	2.2827229179183E+24
Surface area	8.3840319343371E+16
Circumference	513217430.8456

Square

Length = n

Perimeter	326724364
Area	6671800626950281
Diagonal	115514506.68163

Cube

Length = n

Surface area	40030803761701686
Volume	5.4495995414378E+23
Space diagonal	141475799.62966

Equilateral Triangle

Length = n

Perimeter	245043273
Area	2.8889744159619E+15
Altitude	70737899.814828

Triangular Pyramid

Length = n

Surface area	2.8889744159619E+15
Volume	6.4224146508363E+22
Height	38504835.560544