1. Numbers
  2. Compare 1999 vs 2081

Compare 1999 vs 2081

Property19992081
Typeprimeprime
Unique factors11
Total factors11
Prime factorization1999120811
Prime factorization19992081
Divisors count22
Divisors1, 19991, 2081
Number of properties810
Additive primes 162nd
Centered triangular primes10th 
Chen primes 192nd
Cousin primes (1st member)65th 
Primes303rd313th
Prime quadruplets (1st member) 8th
Prime triplets (1st member) 51st
Prime triplets (2nd member)50th 
Prime triplets (3rd member)49th 
Pythagorean primes 152nd
Sexy primes (1st member) 132nd
Sexy primes (2nd member)128th 
Sexy prime triplets (3rd member)50th 
Solinas primes 58th
Super primes 65th
Twin primes (1st member) 63rd
Twin primes (2nd member)61st 
Roman numberalsMCMXCIXMMLXXXI
Base 21111100111121000001000012
Base 32202001322120023
Base 413303342002014
Base 5304445313115
Base 6131316133456
Base 75554760327
Base 83717840418
Base 92661927629
Base 10199910208110
Base 11155811162211
Base 1211a712125512
Base 13baa13c4113
Base 14a2b14a8914
Base 158d41593b15
Base 167cf1682116
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