Compare 13 vs 63

Typeprimecomposite number
Unique factors12
Total factors13
Prime factorization13132 × 71
Prime factorization133 × 3 × 7
Divisors count26
Divisors1, 131, 3, 7, 9, 21, 63
Number of properties320
Centered square primes2nd 
Chen primes6th 
Cousin primes (1st member)3rd 
Cuban primes 21st 
Fibonacci primes4th 
Happy primes2nd 
Harmonic primes2nd 
Left-truncatable primes5th 
Lucky primes3rd 
Multiplicative primes5th 
Pierpont primes5th 
Prime quadruplets (2nd member)2nd 
Prime quadruplets (4th member)1st 
Prime quintuplet 1s (3rd member)1st 
Prime quintuplet 2s (2nd member)2nd 
Prime quintuplet 2s (4th member)1st 
Prime sextuplets (3rd member)1st 
Prime triplets (1st member)4th 
Prime triplets (2nd member)3rd 
Prime triplets (3rd member)2nd 
Proth primes3rd 
Pythagorean primes2nd 
Sexy primes (1st member)4th 
Sexy primes (2nd member)2nd 
Sexy prime triplets (2nd member)2nd 
Solinas primes5th 
Thabit primes of the 2nd kind2nd 
Twin primes (2nd member)3rd 
Ulam primes4th 
Wilson primes2nd 
Roman numberalsXIIILXIII
Base 2110121111112
Base 3111321003
Base 43143334
Base 52352235
Base 62161436
Base 71671207
Base 8158778
Base 9149709
Base 1013106310
Base 1112115811
Base 1211125312
Base 1310134b13
Base 14d144714
Base 15d154315
Base 16d163f16
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