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

81397911 (number)

81397911 is an odd 8-digits composite number following 81397910 and preceding 81397912. In scientific notation, it is written as 8.1397911 × 10^7. The sum of its digits is 39. It has a total of 3 prime factors and 8 positive divisors. There are 46513080 positive integers (up to 81397911) that are relatively prime to 81397911.

Interesting facts

81397911 has 8 divisors, whose sum is 124034944
The reverse of 81397911 is 11979318
Previous prime number is 7

Basic properties

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

Name

Name	eighty-one million three hundred ninety-seven thousand nine hundred eleven

Notation

Scientific notation	8.1397911 × 10^7
Engineering notation	8.1397911 × 10^6

Prime Factorization of 81397911

Prime Factorization 3 × 7 × 3876091

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81397911	Product of the distinct prime numbers

The prime factorization of 81397911 is 3 × 7 × 3876091. Since it has a total of 3 prime factors.

Most popular turbo-numbers

4, 2, 89, 17, 705, 976, 9124, 6230, 40467, 40061, 817776, 65353, 7730579, 3366014, 26921212, 21115195, 545352555, 491315369, 3090014551, 7425143415

Basic calculations (n = 81397911)

Multiplication

n×y

n×2	162795822
n×3	244193733
n×4	325591644
n×5	406989555

Division

n÷y

n÷2	40698955.5
n÷3	27132637
n÷3	20349477.75
n÷5	16279582.2

Exponentiation

n^y

n²	6625619915163921
n³	5.3931162017434E+23
n⁴	4.3898839260217E+31
n⁵	3.5732738111064E+39

Nth Root

^y√n

²√n	9022.0790841136
³√n	433.3822165104
⁴√n	94.984625514415
⁵√n	38.205215337398

Divisors of 81397911

1, 3, 7, 21, 3876091, 11628273, 27132637, 81397911

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	-81397910	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 81397911 can be divided by 8 positive divisors. The sum of these divisors (counting 81397911) is 1, the average is 0.125.

Base conversion 81397911

Base	System	Value
2	Binary	100110110100000100010010111
3	Ternary	12200011102221110
4	Quaternary	10312200202113
5	Quinary	131314213121
6	Senary	12024350103
8	Octal	466404227
10	Decimal	81397911
12	Duodecimal	23315333
16	Hexadecimal	4da0897
20	Vigesimal	158eefb
36	Base36	1cgn13

Cryptographic Hash Functions

md5	124021c107424a8de07037ed7fde7fb5
sha1	684da0c7ef8076aacaee2f28983b6ffbf4f37360
sha256	0b521e8ff336192cc6673f3b598252b314005c9f7b73d01b1f4082cdb3f40171
sha512	a8f90e288aac625ec3ad459be7efad30fdf4e25bb00c0a50cfbf30f1202a9a9bc1ab1c8ffedf4351c6768253eac7875a9ed7b034868ffaf3661cdd80faa949e8
ripemd-160	77c7522d809b61eed0130d8cefb0a141fce08067

81397911 as geometric shapes

Circle

Radius = n

Diameter	162795822
Circumference	511438158.43031
Area	2.0814998850957E+16

Sphere

Radius = n

Volume	2.2590632319138E+24
Surface area	8.3259995403829E+16
Circumference	511438158.43031

Square

Length = n

Perimeter	325591644
Area	6625619915163921
Diagonal	115114029.68504

Cube

Length = n

Surface area	39753719490983526
Volume	5.3931162017434E+23
Space diagonal	140985317.48197

Equilateral Triangle

Length = n

Perimeter	244193733
Area	2.868977581176E+15
Altitude	70492658.740985

Triangular Pyramid

Length = n

Surface area	2.868977581176E+15
Volume	6.355848396633E+22
Height	38371343.228346