Compare 7 vs 13

Unique factors11
Total factors11
Prime factorization71131
Prime factorization713
Divisors count22
Divisors1, 71, 13
Number of properties3732
Additive primes4th 
Carol primes1st 
Centered square primes 2nd
Chen primes4th6th
Class 1+ primes4th 
Cousin primes (2nd member)1st 
Cousin primes (1st member)2nd3rd
Cuban primes 11st 
Cuban primes 2 1st
Double mersenne primes1st 
Emirps 1st
Euclid primes3rd 
Factorial primes4th 
Fibonacci primes 4th
Happy primes1st2nd
Harmonic primes 2nd
Kynea primes2nd 
Left-truncatable primes4th5th
Long primes1st 
Lucas primes3rd 
Lucky primes2nd3rd
Mersenne primes2nd 
Multiplicative primes4th5th
Palindromic primes4th 
Pierpont primes4th5th
Pierpont primes of the 2nd kind4th 
Prime quadruplets (2nd member)1st2nd
Prime quadruplets (4th member) 1st
Prime quintuplet 1s (3rd member) 1st
Prime quintuplet 1s (1st member)1st 
Prime quintuplet 2s (2nd member)1st2nd
Prime quintuplet 2s (4th member) 1st
Prime sextuplets (1st member)1st 
Prime sextuplets (3rd member) 1st
Prime triplets (1st member)2nd4th
Prime triplets (2nd member)1st3rd
Prime triplets (3rd member) 2nd
Proth primes 3rd
Pythagorean primes 2nd
Right-truncatable primes4th 
Safe primes2nd 
Sexy primes (1st member)2nd4th
Sexy primes (2nd member) 2nd
Sexy prime triplets (1st member)2nd 
Sexy prime triplets (2nd member) 2nd
Solinas primes3rd5th
Thabit primes of the 2nd kind1st2nd
Twin primes (2nd member)2nd3rd
Two-sided primes4th 
Ulam primes 4th
Wilson primes 2nd
Woodall primes1st 
Roman numberalsVIIXIII
Base 2111211012
Base 32131113
Base 4134314
Base 5125235
Base 6116216
Base 7107167
Base 878158
Base 979149
Base 107101310
Base 117111211
Base 127121112
Base 137131013
Base 14714d14
Base 15715d15
Base 16716d16
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