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

81909969 (number)

81909969 is an odd 8-digits composite number following 81909968 and preceding 81909970. In scientific notation, it is written as 8.1909969 × 10^7. The sum of its digits is 51. It has a total of 4 prime factors and 16 positive divisors. There are 48299328 positive integers (up to 81909969) that are relatively prime to 81909969.

Interesting facts

81909969 has 16 divisors, whose sum is 112085952
The reverse of 81909969 is 96990918
Previous prime number is 43

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 51
Digital Root 6

Name

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

Notation

Scientific notation	8.1909969 × 10^7
Engineering notation	8.1909969 × 10^6

Prime Factorization of 81909969

Prime Factorization 3 × 437 × 43 × 1453

Composite number

ω	Distinct Factors	4	Total number of distinct prime factors
Ω	Total Factors	4	Total number of prime factors
rad	Radical	81909969	Product of the distinct prime numbers

The prime factorization of 81909969 is 3 × 437 × 43 × 1453. Since it has a total of 4 prime factors.

Most popular turbo-numbers

5, 2, 61, 91, 453, 149, 9471, 6184, 24123, 87762, 401936, 237483, 129793, 912062, 84906802, 69842974, 682865229, 195404525, 8312357626, 1274708929

Basic calculations (n = 81909969)

Multiplication

n×y

n×2	163819938
n×3	245729907
n×4	327639876
n×5	409549845

Division

n÷y

n÷2	40954984.5
n÷3	27303323
n÷3	20477492.25
n÷5	16381993.8

Exponentiation

n^y

n²	6709243021580961
n³	5.4955388791116E+23
n⁴	4.5013941922633E+31
n⁵	3.6870905874507E+39

Nth Root

^y√n

²√n	9050.4126425263
³√n	434.28909115874
⁴√n	95.133656728449
⁵√n	38.253163112517

Divisors of 81909969

1, 3, 43, 129, 437, 1311, 1453, 4359, 18791, 56373, 62479, 187437, 634961, 1904883, 27303323, 81909969

16 divisors

τ	Total Divisors	16	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-81909968	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.0625	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	16	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81909969 can be divided by 16 positive divisors. The sum of these divisors (counting 81909969) is 1, the average is 0.0625.

Base conversion 81909969

Base	System	Value
2	Binary	100111000011101100011010001
3	Ternary	12201010110100120
4	Quaternary	10320131203101
5	Quinary	131432104334
6	Senary	12043340453
8	Octal	470354321
10	Decimal	81909969
12	Duodecimal	23521729
16	Hexadecimal	4e1d8d1
20	Vigesimal	15biei9
36	Base36	1crm4x

Cryptographic Hash Functions

md5	646a8ecd73661add1b0693c0a1047b55
sha1	a7ccec8993e6420e22b3e6c986c5cbd7747be63c
sha256	17c105ca70929200491d4121ad5193736e7a5ebd8fd93fedb58345aa6065f7ba
sha512	c91fed3ba3184fd11457a6199c56d4084806c5fa27844583d41e3091d3a59ea73162a8e74aff11323953f6680920c36d873541909b7162a59c3e73823dffb2c1
ripemd-160	336df81c5e8f3bd7886e4eef8f8a8cf2917b19a9

81909969 as geometric shapes

Circle

Radius = n

Diameter	163819938
Circumference	514655513.73234
Area	2.1077708587747E+16

Sphere

Radius = n

Volume	2.3019659426846E+24
Surface area	8.4310834350989E+16
Circumference	514655513.73234

Square

Length = n

Perimeter	327639876
Area	6709243021580961
Diagonal	115838189.05336

Cube

Length = n

Surface area	40255458129485766
Volume	5.4955388791116E+23
Space diagonal	141872227.95439

Equilateral Triangle

Length = n

Perimeter	245729907
Area	2.9051874484263E+15
Altitude	70936113.977196

Triangular Pyramid

Length = n

Surface area	2.9051874484263E+15
Volume	6.4765546794903E+22
Height	38612729.684453