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

81213979 (number)

81213979 is an odd 8-digits composite number following 81213978 and preceding 81213980. In scientific notation, it is written as 8.1213979 × 10^7. The sum of its digits is 40. It has a total of 3 prime factors and 8 positive divisors. There are 61934400 positive integers (up to 81213979) that are relatively prime to 81213979.

Interesting facts

81213979 has 8 divisors, whose sum is 84022848
The reverse of 81213979 is 97931218
Previous prime number is 47

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 40
Digital Root 4

Name

Name	eighty-one million two hundred thirteen thousand nine hundred seventy-nine

Notation

Scientific notation	8.1213979 × 10^7
Engineering notation	8.1213979 × 10^6

Prime Factorization of 81213979

Prime Factorization 77 × 47 × 22441

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81213979	Product of the distinct prime numbers

The prime factorization of 81213979 is 77 × 47 × 22441. Since it has a total of 3 prime factors.

Most popular turbo-numbers

4, 4, 91, 86, 919, 752, 6765, 6004, 79151, 2698, 568181, 653979, 8555918, 5703013, 83200406, 8755373, 506249175, 108867124, 6641999696, 6820758884

Basic calculations (n = 81213979)

Multiplication

n×y

n×2	162427958
n×3	243641937
n×4	324855916
n×5	406069895

Division

n÷y

n÷2	40606989.5
n÷3	27071326.333333
n÷3	20303494.75
n÷5	16242795.8

Exponentiation

n^y

n²	6595710385012441
n³	5.3566388469848E+23
n⁴	4.3503395482961E+31
n⁵	3.5330838471819E+39

Nth Root

^y√n

²√n	9011.8798815785
³√n	433.0555374683
⁴√n	94.930921630302
⁵√n	38.187933513286

Divisors of 81213979

1, 47, 77, 3619, 22441, 1054727, 1727957, 81213979

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	-81213978	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 81213979 can be divided by 8 positive divisors. The sum of these divisors (counting 81213979) is 1, the average is 0.125.

Base conversion 81213979

Base	System	Value
2	Binary	100110101110011101000011011
3	Ternary	12122211002122011
4	Quaternary	10311303220123
5	Quinary	131242321404
6	Senary	12020410351
8	Octal	465635033
10	Decimal	81213979
12	Duodecimal	232469b7
16	Hexadecimal	4d73a1b
20	Vigesimal	157beij
36	Base36	1ccp3v

Cryptographic Hash Functions

md5	241ede9f3c258c62c2a187fe66ec20ac
sha1	d17bdab0a95d7294c6606d76c663c9e897cf097c
sha256	58c579cfe4418548a1dac6d6872cf17e4c4357104241c9d8c1b97565f8b0f7f6
sha512	eaf3c936539399f2d92f238c3bf7ba0d4c15adfe8bb7502d8289ede42dd9a69e32afd05238118b0cc7dc99e2edf0753cfdf36d2385417477375c7f4cd5e7101e
ripemd-160	3e7948eb7903d63407b30cf33c8cbd388e0f6f0c

81213979 as geometric shapes

Circle

Radius = n

Diameter	162427958
Circumference	510282479.59039
Area	2.0721035290761E+16

Sphere

Radius = n

Volume	2.2437836332828E+24
Surface area	8.2884141163044E+16
Circumference	510282479.59039

Square

Length = n

Perimeter	324855916
Area	6595710385012441
Diagonal	114853910.55608

Cube

Length = n

Surface area	39574262310074646
Volume	5.3566388469848E+23
Space diagonal	140666737.91283

Equilateral Triangle

Length = n

Perimeter	243641937
Area	2.8560263747128E+15
Altitude	70333368.956416

Triangular Pyramid

Length = n

Surface area	2.8560263747128E+15
Volume	6.3128594217838E+22
Height	38284636.852028