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

81686989 (number)

81686989 is an odd 8-digits composite number following 81686988 and preceding 81686990. In scientific notation, it is written as 8.1686989 × 10^7. The sum of its digits is 55. It has a total of 3 prime factors and 8 positive divisors. There are 76802496 positive integers (up to 81686989) that are relatively prime to 81686989.

Interesting facts

81686989 has 8 divisors, whose sum is 86581440
The reverse of 81686989 is 98968618
Previous prime number is 1319

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 55
Digital Root 1

Name

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

Notation

Scientific notation	8.1686989 × 10^7
Engineering notation	8.1686989 × 10^6

Prime Factorization of 81686989

Prime Factorization 17 × 1319 × 3643

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81686989	Product of the distinct prime numbers

The prime factorization of 81686989 is 17 × 1319 × 3643. Since it has a total of 3 prime factors.

Most popular turbo-numbers

9, 6, 76, 11, 655, 269, 2964, 2118, 53997, 78087, 293667, 741827, 3685747, 1650222, 78620734, 64356139, 488601875, 327409601, 2095031976, 2251158120

Basic calculations (n = 81686989)

Multiplication

n×y

n×2	163373978
n×3	245060967
n×4	326747956
n×5	408434945

Division

n÷y

n÷2	40843494.5
n÷3	27228996.333333
n÷3	20421747.25
n÷5	16337397.8

Exponentiation

n^y

n²	6672764171886121
n³	5.4507801350846E+23
n⁴	4.4525781693607E+31
n⁵	3.6371770394221E+39

Nth Root

^y√n

²√n	9038.0854720455
³√n	433.89465082254
⁴√n	95.068845959365
⁵√n	38.232313407361

Divisors of 81686989

1, 17, 1319, 3643, 22423, 61931, 4805117, 81686989

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	-81686988	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 81686989 can be divided by 8 positive divisors. The sum of these divisors (counting 81686989) is 1, the average is 0.125.

Base conversion 81686989

Base	System	Value
2	Binary	100110111100111000111001101
3	Ternary	12200201010111001
4	Quaternary	10313213013031
5	Quinary	131402440424
6	Senary	12034500301
8	Octal	467470715
10	Decimal	81686989
12	Duodecimal	23434691
16	Hexadecimal	4de71cd
20	Vigesimal	15aah99
36	Base36	1cmu31

Cryptographic Hash Functions

md5	99b82e1673b45fd4a3c3c1e64b25eae5
sha1	d8012c17dc445a1320407d5506d975856d1bdbf8
sha256	c452e9df78512aa2a2422c574f2351dc72d949124503edcbd0e9115ed250d21b
sha512	7f650fa56e168d72fdaffbc4eaf8ae5c1eab691ee5a2407e8184e53280975670808146a31228b98b3b96bed652c057ab788aa0dd5b41004528787a5cccf959ca
ripemd-160	0ccc69f1bd2323079b63db4ac30ffde995f13805

81686989 as geometric shapes

Circle

Radius = n

Diameter	163373978
Circumference	513254489.07254
Area	2.0963106901535E+16

Sphere

Radius = n

Volume	2.2832174438286E+24
Surface area	8.3852427606138E+16
Circumference	513254489.07254

Square

Length = n

Perimeter	326747956
Area	6672764171886121
Diagonal	115522847.71322

Cube

Length = n

Surface area	40036585031316726
Volume	5.4507801350846E+23
Space diagonal	141486015.26532

Equilateral Triangle

Length = n

Perimeter	245060967
Area	2.889391643158E+15
Altitude	70743007.63266

Triangular Pyramid

Length = n

Surface area	2.889391643158E+15
Volume	6.423805993792E+22
Height	38507615.904407