1. Numbers
  2. Compare 19997 vs 19999

Compare 19997 vs 19999

Property1999719999
Typeprimesemiprime
Unique factors12
Total factors12
Prime factorization19997171 × 28571
Prime factorization199977 × 2857
Divisors count24
Divisors1, 199971, 7, 2857, 19999
Number of properties91
Chen primes1112th 
Cousin primes (2nd member)344th 
Happy primes377th 
Harmonic primes821st 
Isolated primes1579th 
Primes2262nd 
Prime triplets (3rd member)168th 
Pythagorean primes1125th 
Semiprimes 5081st
Sexy primes (2nd member)693rd 
Roman numberals  
Base 210011100001110121001110000111112
Base 31000102122310001022013
Base 4103201314103201334
Base 51114442511144445
Base 623232562323316
Base 711220571122107
Base 8470358470378
Base 9303789303819
Base 1019997101999910
Base 111402a111403111
Base 12b6a512b6a712
Base 13914313914513
Base 14740514740714
Base 155dd2155dd415
Base 164e1d164e1f16
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