1. Numbers
  2. Compare 197 vs 209

Compare 197 vs 209

Property197209
Typeprimesemiprime
Unique factors12
Total factors12
Prime factorization1971111 × 191
Prime factorization19711 × 19
Divisors count24
Divisors1, 1971, 11, 19, 209
Number of properties131
Additive primes26th 
Centered heptagonal primes3rd 
Chen primes35th 
Cousin primes (2nd member)14th 
Left-truncatable primes20th 
Primes45th 
Prime quadruplets (3rd member)4th 
Prime triplets (2nd member)14th 
Prime triplets (3rd member)13th 
Pythagorean primes21st 
Semiprimes 68th
Sexy primes (2nd member)25th 
Twin primes (1st member)15th 
Ulam primes9th 
Roman numberalsCXCVIICCIX
Base 2110001012110100012
Base 3210223212023
Base 43011431014
Base 51242513145
Base 652565456
Base 740174167
Base 830583218
Base 923892529
Base 101971020910
Base 1116a1118011
Base 121451215512
Base 131221313113
Base 141011410d14
Base 15d215de15
Base 16c516d116
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