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.
987 has 4 divisors, whose sum is 1056
The reverse of 987 is 789
Previous prime number is 21
Is Prime? no
Number parity odd
Number length 3
Sum of Digits 24
Digital Root 6
Name
nine hundred eighty-seven
Scientific notation
9.87 × 10^2
Engineering notation
9.87 × 10^0
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.
1 , 6 , 46 , 71 , 809 , 887 , 6761 , 8002 , 21821 , 69554 , 723460 , 601700 , 317859 , 3137181 , 79174451 , 51570459 , 947577175 , 187161408 , 6885359621 , 873333684
n×2
1974
n×3
2961
n×4
3948
n×5
4935
n÷2
493.5
n÷3
329
n÷3
246.75
n÷5
197.4
n2
974169
n3
961504803
n4
949005240561
n5
936668172433707
2 √n
31.41655614481
3 √n
9.9564775208494
4 √n
5.6050473811387
5 √n
3.9706666713246
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
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
md5
df6d2338b2b8fce1ec2f6dda0a630eb0
sha1
8abcda2dba9a5c5c674e659333828582122c5f56
sha256
55c8079ac96c6a4f6a94e3460c79e4006d62374cce6e9fc8b281938a3abc7627
sha512
bb469369c35040765bec68d409faa6957fee1f4b9029daa5c862e467b61fa53490f611c4680d5880c0631c9737e11a01b45c2335311ad7264a14bbd767c51807
ripemd-160
e6f4c7c75a79717fd7f93b6fa1813969bee89ce9
Diameter
1974
Circumference
6201.5038981863
Area
3060442.1737549
Volume
4027541900.6615
Surface area
12241768.69502
Circumference
6201.5038981863
Perimeter
3948
Area
974169
Diagonal
1395.8287860622
Surface area
5845014
Volume
961504803
Space diagonal
1709.5341470705
Perimeter
2961
Area
421827.55078964
Altitude
854.76707353524
Surface area
421827.55078964
Volume
113314427.72412
Height
465.27626202075