1. Numbers
  2. Compare 197 vs 991

Compare 197 vs 991

Property197991
Typeprimeprime
Unique factors11
Total factors11
Prime factorization19719911
Prime factorization197991
Divisors count22
Divisors1, 1971, 991
Number of properties1310
Additive primes26th89th
Centered heptagonal primes3rd 
Chen primes35th115th
Cousin primes (2nd member)14th 
Emirps 36th
Isolated primes 98th
Left-truncatable primes20th 
Lucky primes 42nd
Primes45th167th
Prime quadruplets (3rd member)4th 
Prime triplets (2nd member)14th 
Prime triplets (3rd member)13th 
Pythagorean primes21st 
Sexy primes (1st member) 74th
Sexy primes (2nd member)25th 
Solinas primes 43rd
Super primes 39th
Twin primes (1st member)15th 
Ulam primes9th18th
Roman numberalsCXCVIICMXCI
Base 211000101211110111112
Base 321022311002013
Base 430114331334
Base 512425124315
Base 6525643316
Base 7401726147
Base 8305817378
Base 9238913219
Base 101971099110
Base 1116a1182111
Base 12145126a712
Base 13122135b313
Base 141011450b14
Base 15d21546115
Base 16c5163df16
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