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

81091749 (number)

81091749 is an odd 8-digits composite number following 81091748 and preceding 81091750. In scientific notation, it is written as 8.1091749 × 10^7. The sum of its digits is 39. It has a total of 3 prime factors and 8 positive divisors. There are 52543296 positive integers (up to 81091749) that are relatively prime to 81091749.

Interesting facts

81091749 has 8 divisors, whose sum is 109114720
The reverse of 81091749 is 94719018
Previous prime number is 247987

Basic properties

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

Name

Name	eighty-one million ninety-one thousand seven hundred forty-nine

Notation

Scientific notation	8.1091749 × 10^7
Engineering notation	8.1091749 × 10^6

Prime Factorization of 81091749

Prime Factorization 3 × 247987 × 109

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81091749	Product of the distinct prime numbers

The prime factorization of 81091749 is 3 × 247987 × 109. Since it has a total of 3 prime factors.

Most popular turbo-numbers

10, 4, 25, 25, 888, 626, 9706, 7992, 6182, 72228, 864393, 855810, 6255017, 7435738, 48113090, 43158859, 700494138, 493939486, 1548983196, 184105808

Basic calculations (n = 81091749)

Multiplication

n×y

n×2	162183498
n×3	243275247
n×4	324366996
n×5	405458745

Division

n÷y

n÷2	40545874.5
n÷3	27030583
n÷3	20272937.25
n÷5	16218349.8

Exponentiation

n^y

n²	6575871755879001
n³	5.3324894188393E+23
n⁴	4.3242089349767E+31
n⁵	3.5065766557869E+39

Nth Root

^y√n

²√n	9005.0957240887
³√n	432.83817359295
⁴√n	94.89518282868
⁵√n	38.176431740461

Divisors of 81091749

1, 3, 109, 327, 247987, 743961, 27030583, 81091749

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	-81091748	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 81091749 can be divided by 8 positive divisors. The sum of these divisors (counting 81091749) is 1, the average is 0.125.

Base conversion 81091749

Base	System	Value
2	Binary	100110101010101110010100101
3	Ternary	12122120212222010
4	Quaternary	10311111302211
5	Quinary	131224413444
6	Senary	12014024433
8	Octal	465256245
10	Decimal	81091749
12	Duodecimal	231a8119
16	Hexadecimal	4d55ca5
20	Vigesimal	156g979
36	Base36	1ca2sl

Cryptographic Hash Functions

md5	c09872d6d9b85c25ec0f1e95c3f92504
sha1	b2315306619e45f632120f18d66e97bc9b5c0202
sha256	8fb094424e7a4ed1a9244b485408f8f1da80a232994125f650e4831a6e04bc72
sha512	cddabd9e5b8bd5ada87f3f73168314c0ffe204d6884b8464cb29e48bd0ff14819e87fb06159c60835bf3dc733e7a67897c7fa8fa6d622ec9e2a9d6b21a7e2c28
ripemd-160	33058a7f16cf4ca506547789a4c2941e1df26c60

81091749 as geometric shapes

Circle

Radius = n

Diameter	162183498
Circumference	509514485.85029
Area	2.0658710399218E+16

Sphere

Radius = n

Volume	2.2336679444761E+24
Surface area	8.2634841596872E+16
Circumference	509514485.85029

Square

Length = n

Perimeter	324366996
Area	6575871755879001
Diagonal	114681051.23235

Cube

Length = n

Surface area	39455230535274006
Volume	5.3324894188393E+23
Space diagonal	140455029.34262

Equilateral Triangle

Length = n

Perimeter	243275247
Area	2.8474359963099E+15
Altitude	70227514.671311

Triangular Pyramid

Length = n

Surface area	2.8474359963099E+15
Volume	6.284399047778E+22
Height	38227017.077452