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

81090987 (number)

81090987 is an odd 8-digits composite number following 81090986 and preceding 81090988. In scientific notation, it is written as 8.1090987 × 10^7. The sum of its digits is 42. It has a total of 3 prime factors and 8 positive divisors. There are 53975040 positive integers (up to 81090987) that are relatively prime to 81090987.

Interesting facts

81090987 has 8 divisors, whose sum is 108292560
The reverse of 81090987 is 78909018
Previous prime number is 641

Basic properties

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

Name

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

Notation

Scientific notation	8.1090987 × 10^7
Engineering notation	8.1090987 × 10^6

Prime Factorization of 81090987

Prime Factorization 3 × 641 × 42169

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81090987	Product of the distinct prime numbers

The prime factorization of 81090987 is 3 × 641 × 42169. Since it has a total of 3 prime factors.

Most popular turbo-numbers

6, 4, 31, 23, 967, 53, 3760, 7312, 95735, 7527, 188889, 884938, 9956916, 5051831, 41055958, 94215366, 386575012, 93068676, 2006481537, 4814104575

Basic calculations (n = 81090987)

Multiplication

n×y

n×2	162181974
n×3	243272961
n×4	324363948
n×5	405454935

Division

n÷y

n÷2	40545493.5
n÷3	27030329
n÷3	20272746.75
n÷5	16218197.4

Exponentiation

n^y

n²	6575748172634169
n³	5.3323390958235E+23
n⁴	4.3240464029902E+31
n⁵	3.5064119065227E+39

Nth Root

^y√n

²√n	9005.0534146112
³√n	432.83681782936
⁴√n	94.894959900993
⁵√n	38.17635999321

Divisors of 81090987

1, 3, 641, 1923, 42169, 126507, 27030329, 81090987

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	-81090986	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 81090987 can be divided by 8 positive divisors. The sum of these divisors (counting 81090987) is 1, the average is 0.125.

Base conversion 81090987

Base	System	Value
2	Binary	100110101010101100110101011
3	Ternary	12122120211220220
4	Quaternary	10311111212223
5	Quinary	131224402422
6	Senary	12014021123
8	Octal	465254653
10	Decimal	81090987
12	Duodecimal	231a77a3
16	Hexadecimal	4d559ab
20	Vigesimal	156g797
36	Base36	1ca27f

Cryptographic Hash Functions

md5	dd801ea632f45be919920615464b102f
sha1	29e9df9d265a5b3478ab89de68a9ff22708daa2c
sha256	9c64688fdbf8d5e2fd460adc2fb1e5e0087f2c44c2ea59b76c67ea03d14be030
sha512	a202cdf4f89bfe36018de7cacd80733b2498bd316c687bf9a0fa2241e450350ce1cf06894b25c4f1e895ce3dd4dbfb9af566d8fe49ade39d54a532fd0dc8bf09
ripemd-160	821ff9266eae973a5f0fcef4951453a706171d91

81090987 as geometric shapes

Circle

Radius = n

Diameter	162181974
Circumference	509509698.06309
Area	2.0658322151004E+16

Sphere

Radius = n

Volume	2.2336049773185E+24
Surface area	8.2633288604016E+16
Circumference	509509698.06309

Square

Length = n

Perimeter	324363948
Area	6575748172634169
Diagonal	114679973.60162

Cube

Length = n

Surface area	39454489035805014
Volume	5.3323390958235E+23
Space diagonal	140453709.51991

Equilateral Triangle

Length = n

Perimeter	243272961
Area	2.8473824831951E+15
Altitude	70226854.759954

Triangular Pyramid

Length = n

Surface area	2.8473824831951E+15
Volume	6.2842218904049E+22
Height	38226657.867207