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

81837981 (number)

81837981 is an odd 8-digits composite number following 81837980 and preceding 81837982. In scientific notation, it is written as 8.1837981 × 10^7. The sum of its digits is 45. It has a total of 2 prime factors and 4 positive divisors. There are 54558648 positive integers (up to 81837981) that are relatively prime to 81837981.

Interesting facts

81837981 has 4 divisors, whose sum is 90931100
The reverse of 81837981 is 18973818
Previous prime number is 9

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 45
Digital Root 9

Name

Name	eighty-one million eight hundred thirty-seven thousand nine hundred eighty-one

Notation

Scientific notation	8.1837981 × 10^7
Engineering notation	8.1837981 × 10^6

Prime Factorization of 81837981

Prime Factorization 9 × 9093109

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	81837981	Product of the distinct prime numbers

The prime factorization of 81837981 is 9 × 9093109. Since it has a total of 2 prime factors.

Most popular turbo-numbers

6, 9, 51, 16, 48, 308, 1059, 9260, 16398, 88932, 754519, 348339, 9222274, 7333453, 88133792, 65722602, 590295167, 709717368, 6804644687, 3286151745

Basic calculations (n = 81837981)

Multiplication

n×y

n×2	163675962
n×3	245513943
n×4	327351924
n×5	409189905

Division

n÷y

n÷2	40918990.5
n÷3	27279327
n÷3	20459495.25
n÷5	16367596.2

Exponentiation

n^y

n²	6697455134156361
n³	5.4810620601744E+23
n⁴	4.4855905274037E+31
n⁵	3.6709167235545E+39

Nth Root

^y√n

²√n	9046.4347120841
³√n	434.16182636299
⁴√n	95.112747369026
⁵√n	38.246436856044

Divisors of 81837981

1, 9, 9093109, 81837981

4 divisors

τ	Total Divisors	4	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-81837980	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.25	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	4	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81837981 can be divided by 4 positive divisors. The sum of these divisors (counting 81837981) is 1, the average is 0.25.

Base conversion 81837981

Base	System	Value
2	Binary	100111000001011111110011101
3	Ternary	12200222210121100
4	Quaternary	10320023332131
5	Quinary	131422303411
6	Senary	12042023313
8	Octal	470137635
10	Decimal	81837981
12	Duodecimal	234a7b39
16	Hexadecimal	4e0bf9d
20	Vigesimal	15b9ej1
36	Base36	1cq2l9

Cryptographic Hash Functions

md5	5a8004b06e93cdb7a5f5b90122dc396c
sha1	efac2e6ca331a7e5e0b58acc3d880fd48fef4ef4
sha256	aa5de042adb06cea91a76540ebc2a9e47ebb5ce3a4ca66a4a0193ba3d399f99b
sha512	e9855a1bf3e730cc978eae65e244fa6b2ee9e0df3b05d5d7b33ccbb7db6770e0491bcedafa748711cb2b8b5f3b78889e436a3e2f1aedb6031ebcfe91d55991e5
ripemd-160	80651a1eeb9f7dd6e6c7cb304a47c4476f65746a

81837981 as geometric shapes

Circle

Radius = n

Diameter	163675962
Circumference	514203199.78844
Area	2.1040675847213E+16

Sphere

Radius = n

Volume	2.2959019069485E+24
Surface area	8.4162703388851E+16
Circumference	514203199.78844

Square

Length = n

Perimeter	327351924
Area	6697455134156361
Diagonal	115736382.64743

Cube

Length = n

Surface area	40184730804938166
Volume	5.4810620601744E+23
Space diagonal	141747541.08086

Equilateral Triangle

Length = n

Perimeter	245513943
Area	2.900083143443E+15
Altitude	70873770.540428

Triangular Pyramid

Length = n

Surface area	2.900083143443E+15
Volume	6.4594935847561E+22
Height	38578794.215811