Compare 13 vs 27

Typeprimecomposite number
Unique factors11
Total factors13
Prime factorization13133
Prime factorization133 × 3 × 3
Divisors count24
Divisors1, 131, 3, 9, 27
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 numberalsXIIIXXVII
Base 211012110112
Base 3111310003
Base 43141234
Base 52351025
Base 6216436
Base 7167367
Base 8158338
Base 9149309
Base 1013102710
Base 1112112511
Base 1211122312
Base 1310132113
Base 14d141d14
Base 15d151c15
Base 16d161b16
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