1. Numbers
  2. Compare 19991 vs 19999

Compare 19991 vs 19999

Property1999119999
Typeprimesemiprime
Unique factors12
Total factors12
Prime factorization19991171 × 28571
Prime factorization199917 × 2857
Divisors count24
Divisors1, 199911, 7, 2857, 19999
Number of properties91
Additive primes1049th 
Chen primes1111th 
Harmonic primes820th 
Palindromic primes46th 
Primes2260th 
Prime triplets (1st member)168th 
Semiprimes 5081st
Sexy primes (1st member)693rd 
Sophie germain primes326th 
Twin primes (1st member)342nd 
Roman numberals  
Base 210011100001011121001110000111112
Base 31000102102310001022013
Base 4103201134103201334
Base 51114431511144445
Base 623231562323316
Base 711216671122107
Base 8470278470378
Base 9303729303819
Base 1019991101999910
Base 1114024111403111
Base 12b69b12b6a712
Base 13913a13914513
Base 1473dd14740714
Base 155dcb155dd415
Base 164e17164e1f16
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