Compare 191 vs 199

Unique factors11
Total factors11
Prime factorization19111991
Prime factorization191199
Divisors count22
Divisors1, 1911, 199
Number of properties1610
Additive primes24th27th
Centered triangular primes 4th
Chen primes34th36th
Class 1+ primes14th 
Emirps 15th
Good primes16th 
Harmonic primes15th 
Lucas primes 7th
Palindromic primes10th 
Pierpont primes of the 2nd kind14th 
Prime quadruplets (1st member)4th 
Prime quadruplets (4th member) 4th
Prime triplets (1st member)13th 
Prime triplets (3rd member) 14th
Sexy primes (1st member)25th 
Sexy primes (2nd member) 26th
Solinas primes25th 
Sophie germain primes15th 
Super primes14th 
Thabit primes6th 
Twin primes (1st member)14th 
Twin primes (2nd member) 15th
Roman numberalsCXCICXCIX
Base 2101111112110001112
Base 3210023211013
Base 42333430134
Base 51231512445
Base 651565316
Base 736274037
Base 827783078
Base 923292419
Base 101911019910
Base 111641117111
Base 1213b1214712
Base 131191312413
Base 14d91410314
Base 15cb15d415
Base 16bf16c716
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