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

81016987 (number)

81016987 is an odd 8-digits prime number following 81016986 and preceding 81016988. In scientific notation, it is written as 8.1016987 × 10^7. The sum of its digits is 40. It has a total of 1 prime factors and 2 positive divisors. There are 81016986 positive integers (up to 81016987) that are relatively prime to 81016987.

Interesting facts

81016987 has 2 divisors, whose sum is 81016988
The reverse of 81016987 is 78961018
Previous prime number is 1

Basic properties

Is Prime? yes
Number parity odd
Number length 8
Sum of Digits 40
Digital Root 4

Name

Name	eighty-one million sixteen thousand nine hundred eighty-seven

Notation

Scientific notation	8.1016987 × 10^7
Engineering notation	8.1016987 × 10^6

Prime Factorization of 81016987

Prime Factorization 81016987

Composite number

ω	Distinct Factors	1	Total number of distinct prime factors
Ω	Total Factors	1	Total number of prime factors
rad	Radical	81016987	Product of the distinct prime numbers

The prime factorization of 81016987 is 81016987. Since it has a total of 1 prime factors.

Most popular turbo-numbers

10, 3, 91, 86, 21, 472, 385, 538, 82960, 28607, 822572, 498423, 9576737, 352059, 70933361, 48576729, 413917782, 954399945, 8724390195, 9213260612

Basic calculations (n = 81016987)

Multiplication

n×y

n×2	162033974
n×3	243050961
n×4	324067948
n×5	405084935

Division

n÷y

n÷2	40508493.5
n÷3	27005662.333333
n÷3	20254246.75
n÷5	16203397.4

Exponentiation

n^y

n²	6563752182558169
n³	5.3177542524554E+23
n⁴	4.3082842714037E+31
n⁵	3.4904421080862E+39

Nth Root

^y√n

²√n	9000.943672749
³√n	432.7051152663
⁴√n	94.873303266772
⁵√n	38.169389841495

Divisors of 81016987

1, 81016987

2 divisors

τ	Total Divisors	2	Total number of the positive divisors of n
σ	Sum of Divisors	81016988	Sum of all the positive divisors of n
s	Aliquot Sum	1	Sum of the proper positive divisors of n
A	Arithmetic Mean	40508494	Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G	Geometric Mean	9000.9437282987	Returns the nth root of the product of n divisors
H	Harmonic Mean	1.9999999753138	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81016987 can be divided by 2 positive divisors. The sum of these divisors (counting 81016987) is 81016988, the average is 40508494.

Base conversion 81016987

Base	System	Value
2	Binary	100110101000011100010011011
3	Ternary	12122110002102011
4	Quaternary	10311003202123
5	Quinary	131220020422
6	Senary	12012250351
8	Octal	465034233
10	Decimal	81016987
12	Duodecimal	231709b7
16	Hexadecimal	4d4389b
20	Vigesimal	1567297
36	Base36	1c8h3v

Cryptographic Hash Functions

md5	a1fe9209be5a3ad7fd22c7af9dfb3038
sha1	e173542c6a46b43f81cb1ef6f154348ba52ac8c9
sha256	17e92de264d0b707b9a7f6c64b9683164a1c4685458ead6f8063047b912bafbc
sha512	234fc8065e92897126bfb927748fcfcefafece5e757a1a5074fc296c83c340fcb22182d0658719d36edee2efbba808a06187c931d481d913fc28723224945939
ripemd-160	a8b695291577e99be3fb02f7bc7f26121ed8f13b

81016987 as geometric shapes

Circle

Radius = n

Diameter	162033974
Circumference	509044742.35036
Area	2.0620635636709E+16

Sphere

Radius = n

Volume	2.2274956924146E+24
Surface area	8.2482542546835E+16
Circumference	509044742.35036

Square

Length = n

Perimeter	324067948
Area	6563752182558169
Diagonal	114575321.798

Cube

Length = n

Surface area	39382513095349014
Volume	5.3177542524554E+23
Space diagonal	140325537.76015

Equilateral Triangle

Length = n

Perimeter	243050961
Area	2.8421880671205E+15
Altitude	70162768.880074

Triangular Pyramid

Length = n

Surface area	2.8421880671205E+15
Volume	6.267033487658E+22
Height	38191773.932668