



Number 981

nine hundred eighty one

Properties of the number 981

Factorization 

3 * 3 * 109

Divisors 
1, 3, 9, 109, 327, 981

Count of divisors 
6

Sum of divisors 
1430

Previous integer 
980 
Next integer 
982 
Is prime? 
NO

Previous prime 
977

Next prime 
983

981st prime 
7727

Is a Fibonacci number? 
NO

Is a Bell number? 
NO

Is a Catalan number? 
NO

Is a factorial? 
NO

Is a regular number? 
NO

Is a perfect number? 
NO

Polygonal number (s < 11)? 
NO 
Binary 
1111010101 
Octal 
1725 
Duodecimal 
699 
Hexadecimal 
3d5 
Square 
962361 
Square root 
31.320919526732 
Natural logarithm 
6.8885724595654 
Decimal logarithm 
2.9916690073799 
Sine 
0.73325181368078 
Cosine 
0.67995718816249 
Tangent 
1.0783793839467 

Number 981 is pronounced nine hundred eighty one.
Number 981 is a composite number.
Factors of 981 are 3 * 3 * 109.
Number 981 has 6 divisors: 1, 3, 9, 109, 327, 981.
Sum of the divisors is 1430.
Number 981 is not a Fibonacci number.
It is not a Bell number.
Number 981 is not a Catalan number.
Number 981 is not a regular number (Hamming number).
It is a not factorial of any number.
Number 981 is a deficient number and therefore is not a perfect number.
Binary numeral for number 981 is 1111010101.
Octal numeral is 1725.
Duodecimal value is 699.
Hexadecimal representation is 3d5.
Square of the number 981 is 962361.
Square root of the number 981 is 31.320919526732.
Natural logarithm of 981 is 6.8885724595654
Decimal logarithm of the number 981 is 2.9916690073799
Sine of 981 is 0.73325181368078. Cosine of the number 981 is 0.67995718816249. Tangent of the number 981 is 1.0783793839467



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