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

81091389 (number)

81091389 is an odd 8-digits composite number following 81091388 and preceding 81091390. In scientific notation, it is written as 8.1091389 × 10^7. The sum of its digits is 39. It has a total of 2 prime factors and 4 positive divisors. There are 54060924 positive integers (up to 81091389) that are relatively prime to 81091389.

Interesting facts

81091389 has 4 divisors, whose sum is 108121856
The reverse of 81091389 is 98319018
Previous prime number is 3

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 three hundred eighty-nine

Notation

Scientific notation	8.1091389 × 10^7
Engineering notation	8.1091389 × 10^6

Prime Factorization of 81091389

Prime Factorization 3 × 27030463

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	81091389	Product of the distinct prime numbers

The prime factorization of 81091389 is 3 × 27030463. Since it has a total of 2 prime factors.

Most popular turbo-numbers

6, 1, 81, 41, 312, 247, 7330, 4697, 47067, 87254, 21678, 318295, 1989539, 937380, 34794409, 79312831, 626798790, 859297858, 2317623255, 7137522682

Basic calculations (n = 81091389)

Multiplication

n×y

n×2	162182778
n×3	243274167
n×4	324365556
n×5	405456945

Division

n÷y

n÷2	40545694.5
n÷3	27030463
n÷3	20272847.25
n÷5	16218277.8

Exponentiation

n^y

n²	6575813369949321
n³	5.3324183997396E+23
n⁴	4.3241321476404E+31
n⁵	3.5064988207172E+39

Nth Root

^y√n

²√n	9005.0757353839
³√n	432.83753307577
⁴√n	94.895077508709
⁵√n	38.176397844189

Divisors of 81091389

1, 3, 27030463, 81091389

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	-81091388	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 81091389 can be divided by 4 positive divisors. The sum of these divisors (counting 81091389) is 1, the average is 0.25.

Base conversion 81091389

Base	System	Value
2	Binary	100110101010101101100111101
3	Ternary	12122120212110210
4	Quaternary	10311111230331
5	Quinary	131224411024
6	Senary	12014023033
8	Octal	465255475
10	Decimal	81091389
12	Duodecimal	231a7a79
16	Hexadecimal	4d55b3d
20	Vigesimal	156g899
36	Base36	1ca2il

Cryptographic Hash Functions

md5	39f6cb43ae5309be0cd705cc09081bb5
sha1	d9e0ceada7f9b4c4b2485208e481a538bc5f2fd0
sha256	55f4b997525e9b1c1237027bd0eee65108b4b56632d95edc3d6082a5552bc542
sha512	17ba7db697012c34df18432c329c143c8c2df3618db46118b9adac442b1e797685e3645f4f6ecba23885d129c8548bb648452b8f43c5c064246af56544fd1a6a
ripemd-160	b295b040d7f9aff5e4a30bdef938854c65b49cb8

81091389 as geometric shapes

Circle

Radius = n

Diameter	162182778
Circumference	509512223.90358
Area	2.065852697441E+16

Sphere

Radius = n

Volume	2.2336381960652E+24
Surface area	8.2634107897641E+16
Circumference	509512223.90358

Square

Length = n

Perimeter	324365556
Area	6575813369949321
Diagonal	114680542.11547

Cube

Length = n

Surface area	39454880219695926
Volume	5.3324183997396E+23
Space diagonal	140454405.80433

Equilateral Triangle

Length = n

Perimeter	243274167
Area	2.8474107144607E+15
Altitude	70227202.902166

Triangular Pyramid

Length = n

Surface area	2.8474107144607E+15
Volume	6.2843153509663E+22
Height	38226847.371824