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

81491907 (number)

81491907 is an odd 8-digits composite number following 81491906 and preceding 81491908. In scientific notation, it is written as 8.1491907 × 10^7. The sum of its digits is 39. It has a total of 3 prime factors and 8 positive divisors. There are 46566792 positive integers (up to 81491907) that are relatively prime to 81491907.

Interesting facts

81491907 has 8 divisors, whose sum is 124178176
The reverse of 81491907 is 70919418
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 four hundred ninety-one thousand nine hundred seven

Notation

Scientific notation	8.1491907 × 10^7
Engineering notation	8.1491907 × 10^6

Prime Factorization of 81491907

Prime Factorization 3 × 7 × 3880567

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81491907	Product of the distinct prime numbers

The prime factorization of 81491907 is 3 × 7 × 3880567. Since it has a total of 3 prime factors.

Most popular turbo-numbers

7, 7, 81, 44, 672, 446, 695, 7432, 87241, 48266, 189840, 282222, 7023292, 7506319, 63908665, 1984551, 522064154, 389888679, 2271371503, 952562263

Basic calculations (n = 81491907)

Multiplication

n×y

n×2	162983814
n×3	244475721
n×4	325967628
n×5	407459535

Division

n÷y

n÷2	40745953.5
n÷3	27163969
n÷3	20372976.75
n÷5	16298381.4

Exponentiation

n^y

n²	6640930906496649
n³	5.4118212382565E+23
n⁴	4.4101963304862E+31
n⁵	3.5939530921573E+39

Nth Root

^y√n

²√n	9027.2868016919
³√n	433.54897150464
⁴√n	95.012035036051
⁵√n	38.214034924406

Divisors of 81491907

1, 3, 7, 21, 3880567, 11641701, 27163969, 81491907

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	-81491906	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 81491907 can be divided by 8 positive divisors. The sum of these divisors (counting 81491907) is 1, the average is 0.125.

Base conversion 81491907

Base	System	Value
2	Binary	100110110110111011111000011
3	Ternary	12200100012212210
4	Quaternary	10312313133003
5	Quinary	131330220112
6	Senary	12030353203
8	Octal	466673703
10	Decimal	81491907
12	Duodecimal	2335b803
16	Hexadecimal	4db77c3
20	Vigesimal	15969f7
36	Base36	1cink3

Cryptographic Hash Functions

md5	5af2d95e376579cfc6309b257d83e4ae
sha1	07c8b8e2b48654b486a9fff02488faaefefb9b24
sha256	cedcf84ddf7524a3716151a3cbfb6f0e6744bc10f83f96edbd9c39ca3a2f4989
sha512	562f32c0d51a5c26c224cfac47dd8dc68e8033dd647109a1f0510a89492070b46366e1538512401d884bd7520732fb6d4b7a56567b5d8c887fe0848315a53b83
ripemd-160	2ce760465917c6c7f8f0d774c7ec6cf56cb4e88b

81491907 as geometric shapes

Circle

Radius = n

Diameter	162983814
Circumference	512028752.71645
Area	2.0863099748847E+16

Sphere

Radius = n

Volume	2.2668983792864E+24
Surface area	8.3452398995389E+16
Circumference	512028752.71645

Square

Length = n

Perimeter	325967628
Area	6640930906496649
Diagonal	115246960.10305

Cube

Length = n

Surface area	39845585438979894
Volume	5.4118212382565E+23
Space diagonal	141148123.32968

Equilateral Triangle

Length = n

Perimeter	244475721
Area	2.8756074349017E+15
Altitude	70574061.664839

Triangular Pyramid

Length = n

Surface area	2.8756074349017E+15
Volume	6.3778924935676E+22
Height	38415653.367682