1. Numbers
  2. Compare 199811 vs 199921

Compare 199811 vs 199921

Property199811199921
Typeprimeprime
Unique factors11
Total factors11
Prime factorization19981111999211
Prime factorization199811199921
Divisors count22
Divisors1, 1998111, 199921
Number of properties85
Additive primes7214th7221st
Chen primes7520th 
Cousin primes (2nd member)2134th 
Harmonic primes6753rd 
Isolated primes 13662nd
Long primes6734th 
Primes17970th17979th
Prime triplets (2nd member)840th 
Pythagorean primes 8975th
Twin primes (1st member)2159th 
Ulam primes 1289th
Roman numberals  
Base 211000011001000001121100001100111100012
Base 310101100210231010110201113
Base 430030200343003033014
Base 5223432215223441415
Base 64141015641413216
Base 71461353714616017
Base 860620386063618
Base 933407293342149
Base 101998111019992110
Base 111271371112722711
Base 129776b129784112
Base 136cc41136ccc713
Base 1452b631452c0114
Base 153e30b153e38115
Base 1630c831630cf116
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