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

81397905 (number)

81397905 is an odd 8-digits composite number following 81397904 and preceding 81397906. In scientific notation, it is written as 8.1397905 × 10^7. The sum of its digits is 42. It has a total of 2 prime factors and 4 positive divisors. There are 43412208 positive integers (up to 81397905) that are relatively prime to 81397905.

Interesting facts

81397905 has 4 divisors, whose sum is 86824448
The reverse of 81397905 is 50979318
Previous prime number is 15

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 42
Digital Root 6

Name

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

Notation

Scientific notation	8.1397905 × 10^7
Engineering notation	8.1397905 × 10^6

Prime Factorization of 81397905

Prime Factorization 15 × 5426527

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	81397905	Product of the distinct prime numbers

The prime factorization of 81397905 is 15 × 5426527. Since it has a total of 2 prime factors.

Most popular turbo-numbers

5, 7, 32, 33, 284, 484, 4179, 1561, 8856, 93129, 108705, 283800, 6541210, 8407700, 6540370, 88051770, 107111353, 298726414, 6108031910, 7386290972

Basic calculations (n = 81397905)

Multiplication

n×y

n×2	162795810
n×3	244193715
n×4	325591620
n×5	406989525

Division

n÷y

n÷2	40698952.5
n÷3	27132635
n÷3	20349476.25
n÷5	16279581

Exponentiation

n^y

n²	6625618938389025
n³	5.3931150091319E+23
n⁴	4.3898826316739E+31
n⁵	3.5732724941414E+39

Nth Root

^y√n

²√n	9022.078751596
³√n	433.38220586191
⁴√n	94.984623764039
⁵√n	38.205214774162

Divisors of 81397905

1, 15, 5426527, 81397905

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	-81397904	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 81397905 can be divided by 4 positive divisors. The sum of these divisors (counting 81397905) is 1, the average is 0.25.

Base conversion 81397905

Base	System	Value
2	Binary	100110110100000100010010001
3	Ternary	12200011102221020
4	Quaternary	10312200202101
5	Quinary	131314213110
6	Senary	12024350053
8	Octal	466404221
10	Decimal	81397905
12	Duodecimal	23315329
16	Hexadecimal	4da0891
20	Vigesimal	158eef5
36	Base36	1cgn0x

Cryptographic Hash Functions

md5	2de15b9f02424411507e6958b969fc6b
sha1	28d1a60f3ad60eb26f363e8819b8a1ad28863e9e
sha256	efbb5a25aed1a9399b3d29075ed27c061a1e8e4791912710ebc20956f90dae58
sha512	b14f1ff0decae980b21f6f17a780f9569893a79268fd4e7b9606b636289ad286669527636400b5ae096b644c1bad565355c559bbe11a8a446eb5b1c08f95b84d
ripemd-160	613ff5f5e69c4dea6f79f4bfe3fddc9f391f129b

81397905 as geometric shapes

Circle

Radius = n

Diameter	162795810
Circumference	511438120.7312
Area	2.0814995782328E+16

Sphere

Radius = n

Volume	2.2590627323538E+24
Surface area	8.3259983129313E+16
Circumference	511438120.7312

Square

Length = n

Perimeter	325591620
Area	6625618938389025
Diagonal	115114021.19976

Cube

Length = n

Surface area	39753713630334150
Volume	5.3931150091319E+23
Space diagonal	140985307.08966

Equilateral Triangle

Length = n

Perimeter	244193715
Area	2.8689771582201E+15
Altitude	70492653.544832

Triangular Pyramid

Length = n

Surface area	2.8689771582201E+15
Volume	6.3558469911269E+22
Height	38371340.399919