1. Numbers
  2. Compare 821 vs 997

Compare 821 vs 997

Property821997
Typeprimeprime
Unique factors11
Total factors11
Prime factorization82119971
Prime factorization821997
Divisors count22
Divisors1, 8211, 997
Number of properties106
Additive primes75th 
Chen primes97th 
Good primes40th 
Isolated primes 99th
Left-truncatable primes 54th
Long primes50th 
Lucky primes 43rd
Primes142nd168th
Prime quadruplets (1st member)5th 
Prime triplets (1st member)25th 
Pythagorean primes69th80th
Sexy primes (1st member)64th 
Sexy primes (2nd member) 74th
Twin primes (1st member)32nd 
Roman numberalsDCCCXXICMXCVII
Base 21100110101211111001012
Base 31010102311002213
Base 4303114332114
Base 5112415124425
Base 63445643416
Base 72252726237
Base 81465817458
Base 91112913279
Base 108211099710
Base 116871182711
Base 12585126b112
Base 134b2135b913
Base 144291451314
Base 1539b1546715
Base 16335163e516
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