987 (number)

987 is an odd 3-digits composite number following 986 and preceding 988. In scientific notation, it is written as 9.87 × 10^2. The sum of its digits is 24. It has a total of 2 prime factors and 4 positive divisors. There are 552 positive integers (up to 987) that are relatively prime to 987.

Interesting facts

Basic properties

Name

Name nine hundred eighty-seven

Notation

Scientific notation 9.87 × 10^2
Engineering notation 9.87 × 10^0

Prime Factorization of 987

Prime Factorization 21 × 47

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 987
Product of the distinct prime numbers

The prime factorization of 987 is 21 × 47. Since it has a total of 2 prime factors.

Most popular turbo-numbers

Basic calculations (n = 987)

Multiplication

n×y
n×2 1974
n×3 2961
n×4 3948
n×5 4935

Division

n÷y
n÷2 493.5
n÷3 329
n÷3 246.75
n÷5 197.4

Exponentiation

ny
n2 974169
n3 961504803
n4 949005240561
n5 936668172433707

Nth Root

y√n
2√n 31.41655614481
3√n 9.9564775208494
4√n 5.6050473811387
5√n 3.9706666713246

Divisors of 987

1, 21, 47, 987

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 -986
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 987 can be divided by 4 positive divisors. The sum of these divisors (counting 987) is 1, the average is 0.25.

Base conversion 987

Base System Value
2 Binary 1111011011
3 Ternary 1100120
4 Quaternary 33123
5 Quinary 12422
6 Senary 4323
8 Octal 1733
10 Decimal 987
12 Duodecimal 6a3
16 Hexadecimal 3db
20 Vigesimal 297
36 Base36 rf

Cryptographic Hash Functions

md5 df6d2338b2b8fce1ec2f6dda0a630eb0
sha1 8abcda2dba9a5c5c674e659333828582122c5f56
sha256 55c8079ac96c6a4f6a94e3460c79e4006d62374cce6e9fc8b281938a3abc7627
sha512 bb469369c35040765bec68d409faa6957fee1f4b9029daa5c862e467b61fa53490f611c4680d5880c0631c9737e11a01b45c2335311ad7264a14bbd767c51807
ripemd-160 e6f4c7c75a79717fd7f93b6fa1813969bee89ce9

987 as geometric shapes

Circle

Radius = n
Diameter 1974
Circumference 6201.5038981863
Area 3060442.1737549

Sphere

Radius = n
Volume 4027541900.6615
Surface area 12241768.69502
Circumference 6201.5038981863

Square

Length = n
Perimeter 3948
Area 974169
Diagonal 1395.8287860622

Cube

Length = n
Surface area 5845014
Volume 961504803
Space diagonal 1709.5341470705

Equilateral Triangle

Length = n
Perimeter 2961
Area 421827.55078964
Altitude 854.76707353524

Triangular Pyramid

Length = n
Surface area 421827.55078964
Volume 113314427.72412
Height 465.27626202075