



Number 13

thirteen

Properties of the number 13

Factorization 

13

Divisors 
1, 13

Count of divisors 
2

Sum of divisors 
14

Previous integer 
12 
Next integer 
14 
Is prime? 
YES
(6th prime)

Previous prime 
11

Next prime 
17

13th prime 
41

Is a Fibonacci number? 
YES F_{7}

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 
1101 
Octal 
15 
Duodecimal 
11 
Hexadecimal 
d 
Square 
169 
Square root 
3.605551275464 
Natural logarithm 
2.5649493574615 
Decimal logarithm 
1.1139433523068 
Sine 
0.42016703682664 
Cosine 
0.9074467814502 
Tangent 
0.46302113293649 

Number 13 is pronounced thirteen.
Number 13 is a prime number.
The prime number before 13 is 11.
The prime number after 13 is 17.
Number 13 has 2 divisors: 1, 13.
Sum of the divisors is 14.
Number 13 is a Fibonacci number.
It is not a Bell number.
Number 13 is not a Catalan number.
Number 13 is not a regular number (Hamming number).
It is a not factorial of any number.
Number 13 is a deficient number and therefore is not a perfect number.
Binary numeral for number 13 is 1101.
Octal numeral is 15.
Duodecimal value is 11.
Hexadecimal representation is d.
Square of the number 13 is 169.
Square root of the number 13 is 3.605551275464.
Natural logarithm of 13 is 2.5649493574615
Decimal logarithm of the number 13 is 1.1139433523068
Sine of 13 is 0.42016703682664. Cosine of the number 13 is 0.9074467814502. Tangent of the number 13 is 0.46302113293649



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