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

81491909 (number)

81491909 is an odd 8-digits composite number following 81491908 and preceding 81491910. In scientific notation, it is written as 8.1491909 × 10^7. The sum of its digits is 41. It has a total of 2 prime factors and 4 positive divisors. There are 81256716 positive integers (up to 81491909) that are relatively prime to 81491909.

Interesting facts

81491909 has 4 divisors, whose sum is 81727104
The reverse of 81491909 is 90919418
Previous prime number is 347

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 41
Digital Root 5

Name

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

Notation

Scientific notation	8.1491909 × 10^7
Engineering notation	8.1491909 × 10^6

Prime Factorization of 81491909

Prime Factorization 347 × 234847

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	81491909	Product of the distinct prime numbers

The prime factorization of 81491909 is 347 × 234847. Since it has a total of 2 prime factors.

Most popular turbo-numbers

5, 9, 67, 51, 892, 845, 2332, 4387, 40666, 35724, 485695, 605678, 6782609, 4968059, 34279325, 6369385, 576805773, 983613677, 4471011099, 1552974731

Basic calculations (n = 81491909)

Multiplication

n×y

n×2	162983818
n×3	244475727
n×4	325967636
n×5	407459545

Division

n÷y

n÷2	40745954.5
n÷3	27163969.666667
n÷3	20372977.25
n÷5	16298381.8

Exponentiation

n^y

n²	6640931232464281
n³	5.4118216367124E+23
n⁴	4.410196763432E+31
n⁵	3.5939535331769E+39

Nth Root

^y√n

²√n	9027.2869124671
³√n	433.5489750514
⁴√n	95.012035619005
⁵√n	38.214035111978

Divisors of 81491909

1, 347, 234847, 81491909

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	-81491908	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 81491909 can be divided by 4 positive divisors. The sum of these divisors (counting 81491909) is 1, the average is 0.25.

Base conversion 81491909

Base	System	Value
2	Binary	100110110110111011111000101
3	Ternary	12200100012212212
4	Quaternary	10312313133011
5	Quinary	131330220114
6	Senary	12030353205
8	Octal	466673705
10	Decimal	81491909
12	Duodecimal	2335b805
16	Hexadecimal	4db77c5
20	Vigesimal	15969f9
36	Base36	1cink5

Cryptographic Hash Functions

md5	8c0e7af43116fa336ad71503c4a97409
sha1	37b1e946b2e066d367736b49ff750f065256e7fe
sha256	cadae6d31c1de2c1f9f23b733e0de4e8b7524e0c0a3fd6eea8089ad22e8db80e
sha512	bf74503da0748a38952bd1d23bb5ba4491070152d4b361166c6d063dc8320de3702a10cc66c61c22f4ef9731d693e89e5ac24cf607ededcccef8c520101708f7
ripemd-160	b00361f00f688aed3ab7ddaf6ec929334c2a02bd

81491909 as geometric shapes

Circle

Radius = n

Diameter	162983818
Circumference	512028765.28282
Area	2.0863100772905E+16

Sphere

Radius = n

Volume	2.2668985461912E+24
Surface area	8.3452403091619E+16
Circumference	512028765.28282

Square

Length = n

Perimeter	325967636
Area	6640931232464281
Diagonal	115246962.93147

Cube

Length = n

Surface area	39845587394785686
Volume	5.4118216367124E+23
Space diagonal	141148126.79378

Equilateral Triangle

Length = n

Perimeter	244475727
Area	2.8756075760498E+15
Altitude	70574063.39689

Triangular Pyramid

Length = n

Surface area	2.8756075760498E+15
Volume	6.3778929631523E+22
Height	38415654.310491