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

81998921 (number)

81998921 is an odd 8-digits composite number following 81998920 and preceding 81998922. In scientific notation, it is written as 8.1998921 × 10^7. The sum of its digits is 47. It has a total of 2 prime factors and 4 positive divisors. There are 79171344 positive integers (up to 81998921) that are relatively prime to 81998921.

Interesting facts

81998921 has 4 divisors, whose sum is 84826500
The reverse of 81998921 is 12989918
Previous prime number is 29

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 47
Digital Root 2

Name

Name	eighty-one million nine hundred ninety-eight thousand nine hundred twenty-one

Notation

Scientific notation	8.1998921 × 10^7
Engineering notation	8.1998921 × 10^6

Prime Factorization of 81998921

Prime Factorization 29 × 2827549

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	81998921	Product of the distinct prime numbers

The prime factorization of 81998921 is 29 × 2827549. Since it has a total of 2 prime factors.

Most popular turbo-numbers

7, 4, 19, 98, 871, 772, 7705, 322, 96184, 95910, 735787, 676786, 9518971, 4701109, 72213065, 85241706, 595395259, 448766635, 6950487796, 5030744862

Basic calculations (n = 81998921)

Multiplication

n×y

n×2	163997842
n×3	245996763
n×4	327995684
n×5	409994605

Division

n÷y

n÷2	40999460.5
n÷3	27332973.666667
n÷3	20499730.25
n÷5	16399784.2

Exponentiation

n^y

n²	6723823045164241
n³	5.513462346984E+23
n⁴	4.5209796342682E+31
n⁵	3.7071545187296E+39

Nth Root

^y√n

²√n	9055.3255601331
³√n	434.44624300122
⁴√n	95.159474358222
⁵√n	38.261467884879

Divisors of 81998921

1, 29, 2827549, 81998921

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	-81998920	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 81998921 can be divided by 4 positive divisors. The sum of these divisors (counting 81998921) is 1, the average is 0.25.

Base conversion 81998921

Base	System	Value
2	Binary	100111000110011010001001001
3	Ternary	12201021222101002
4	Quaternary	10320303101021
5	Quinary	131442431141
6	Senary	12045304345
8	Octal	470632111
10	Decimal	81998921
12	Duodecimal	235650b5
16	Hexadecimal	4e33449
20	Vigesimal	15c9h61
36	Base36	1ctirt

Cryptographic Hash Functions

md5	6a13d7af4f933f6880f73bef6f35287c
sha1	35ccc8f9364ad4bf9ce243c8ce80ca1421d36c65
sha256	366beb8d6f02db758772617789bd0423e04a0eb1c793a783faad49ce16107999
sha512	d1b91277c4b860d90a0a0c6d9d1a5e1926e4b217336cf0773fd741ba0aabac4455ea97b45ad80675d4fd6a846af3417c9c9d7f4a5a87e37e488be42ae3262a84
ripemd-160	613d8a3657d486a1aaea72945f368a29d26ee3c9

81998921 as geometric shapes

Circle

Radius = n

Diameter	163997842
Circumference	515214415.63178
Area	2.1123513082726E+16

Sphere

Radius = n

Volume	2.3094737073505E+24
Surface area	8.4494052330903E+16
Circumference	515214415.63178

Square

Length = n

Perimeter	327995684
Area	6723823045164241
Diagonal	115963986.17816

Cube

Length = n

Surface area	40342938270985446
Volume	5.513462346984E+23
Space diagonal	142026297.33783

Equilateral Triangle

Length = n

Perimeter	245996763
Area	2.9115007838317E+15
Altitude	71013148.668913

Triangular Pyramid

Length = n

Surface area	2.9115007838317E+15
Volume	6.4976776889485E+22
Height	38654662.059387