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

81609987 (number)

81609987 is an odd 8-digits composite number following 81609986 and preceding 81609988. In scientific notation, it is written as 8.1609987 × 10^7. The sum of its digits is 48. It has a total of 3 prime factors and 8 positive divisors. There are 53726400 positive integers (up to 81609987) that are relatively prime to 81609987.

Interesting facts

81609987 has 8 divisors, whose sum is 108963520
The reverse of 81609987 is 78990618
Previous prime number is 36811

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 48
Digital Root 3

Name

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

Notation

Scientific notation	8.1609987 × 10^7
Engineering notation	8.1609987 × 10^6

Prime Factorization of 81609987

Prime Factorization 3 × 36811 × 739

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81609987	Product of the distinct prime numbers

The prime factorization of 81609987 is 3 × 36811 × 739. Since it has a total of 3 prime factors.

Most popular turbo-numbers

3, 8, 41, 20, 850, 471, 8300, 8474, 49078, 71406, 858140, 829703, 9551090, 8872057, 42305660, 94769789, 242972554, 198074221, 2146072644, 8169511710

Basic calculations (n = 81609987)

Multiplication

n×y

n×2	163219974
n×3	244829961
n×4	326439948
n×5	408049935

Division

n÷y

n÷2	40804993.5
n÷3	27203329
n÷3	20402496.75
n÷5	16321997.4

Exponentiation

n^y

n²	6660189978140169
n³	5.4353801753355E+23
n⁴	4.4358130544919E+31
n⁵	3.6200664571151E+39

Nth Root

^y√n

²√n	9033.8246053374
³√n	433.75827145541
⁴√n	95.046433943297
⁵√n	38.225102772451

Divisors of 81609987

1, 3, 739, 2217, 36811, 110433, 27203329, 81609987

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	-81609986	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 81609987 can be divided by 8 positive divisors. The sum of these divisors (counting 81609987) is 1, the average is 0.125.

Base conversion 81609987

Base	System	Value
2	Binary	100110111010100010100000011
3	Ternary	12200120012212010
4	Quaternary	10313110110003
5	Quinary	131343004422
6	Senary	12033104003
8	Octal	467242403
10	Decimal	81609987
12	Duodecimal	233b8003
16	Hexadecimal	4dd4503
20	Vigesimal	15a14j7
36	Base36	1cl6o3

Cryptographic Hash Functions

md5	f7cc8e5a8b646fb18b50614aedceca92
sha1	0133146d36ee8a2d05a81fe40ebf70792b8592b7
sha256	326c6e22f1ab8d1baa14cfba145d29ea9ba5be7733cea1b177aa340f84112ef4
sha512	8b26001ed5a79b8eaa3547866ad1a11822ebbde674daac394299577c3a3cf1ddc639dcc83d6c3895c6fa4982886be1c78d63259e7e6b5305fb1baf53aa431e68
ripemd-160	ac0d0adeaec1608c489075b34a15d529c518393b

81609987 as geometric shapes

Circle

Radius = n

Diameter	163219974
Circumference	512770671.23752
Area	2.0923603906838E+16

Sphere

Radius = n

Volume	2.2767667237735E+24
Surface area	8.369441562735E+16
Circumference	512770671.23752

Square

Length = n

Perimeter	326439948
Area	6660189978140169
Diagonal	115413950.44049

Cube

Length = n

Surface area	39961139868841014
Volume	5.4353801753355E+23
Space diagonal	141352643.88904

Equilateral Triangle

Length = n

Perimeter	244829961
Area	2.88394685755E+15
Altitude	70676321.944518

Triangular Pyramid

Length = n

Surface area	2.88394685755E+15
Volume	6.4056569671778E+22
Height	38471316.813497