Compare 131 vs 191

Unique factors11
Total factors11
Prime factorization13111911
Prime factorization131191
Divisors count22
Divisors1, 1311, 191
Number of properties1216
Additive primes17th24th
Chen primes26th34th
Class 1+ primes 14th
Cousin primes (2nd member)12th 
Good primes 16th
Harmonic primes 15th
Isolated primes13th 
Long primes12th 
Multiplicative primes10th 
Palindromic primes7th10th
Pierpont primes of the 2nd kind 14th
Prime quadruplets (1st member) 4th
Prime triplets (1st member) 13th
Sexy primes (1st member)20th25th
Solinas primes23rd25th
Sophie germain primes12th15th
Super primes 14th
Thabit primes 6th
Twin primes (1st member) 14th
Ulam primes8th 
Roman numberalsCXXXICXCI
Base 2100000112101111112
Base 3112123210023
Base 42003423334
Base 51011512315
Base 633565156
Base 724573627
Base 820382778
Base 915592329
Base 101311019110
Base 1110a1116411
Base 12ab1213b12
Base 13a11311913
Base 149514d914
Base 158b15cb15
Base 168316bf16
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