Compare 4 vs 13

Unique factors11
Total factors21
Prime factorization22131
Prime factorization2 × 213
Divisors count32
Divisors1, 2, 41, 13
Number of properties132
Centered square primes 2nd
Chen primes 6th
Cousin primes (1st member) 3rd
Cuban primes 2 1st
Emirps 1st
Fibonacci primes 4th
Happy primes 2nd
Harmonic primes 2nd
Left-truncatable primes 5th
Lucky primes 3rd
Multiplicative primes 5th
Pierpont primes 5th
Primes 6th
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 primes 3rd
Pythagorean primes 2nd
Sexy primes (1st member) 4th
Sexy primes (2nd member) 2nd
Sexy prime triplets (2nd member) 2nd
Solinas primes 5th
Thabit primes of the 2nd kind 2nd
Twin primes (2nd member) 3rd
Ulam primes 4th
Wilson primes 2nd
Roman numberalsIVXIII
Base 2100211012
Base 31131113
Base 4104314
Base 545235
Base 646216
Base 747167
Base 848158
Base 949149
Base 104101310
Base 114111211
Base 124121112
Base 134131013
Base 14414d14
Base 15415d15
Base 16416d16
This website uses cookies to ensure you get the best experience on our website. More info