Compare 663979 vs 663991

Property	663979	663991
Type	prime	prime
Unique factors	1	1
Total factors	1	1
Prime factorization	663979¹	663991¹
Prime factorization	663979	663991
Divisors count	2	2
Divisors	1, 663979	1, 663991
Number of properties	10	3
Chen primes	21068th
Cousin primes (1st member)	5809th
Isolated primes		42236th
Lucky primes	6163rd
Primes	53865th	53867th
Prime triplets (2nd member)	2118th
Prime triplets (3rd member)	2117th
Sexy primes (1st member)		11629th
Sexy primes (2nd member)	11627th
Sexy prime quadrupletss (4th member)	238th
Sexy prime triplets (3rd member)	2120th
Twin primes (2nd member)	5816th
Roman numberals
Base 2	10100010000110101011₂	10100010000110110111₂
Base 3	1020201210211₃	1020201211021₃
Base 4	2202012223₄	2202012313₄
Base 5	132221404₅	132221431₅
Base 6	22121551₆	22122011₆
Base 7	5433541₇	5433556₇
Base 8	2420653₈	2420667₈
Base 9	1221724₉	1221737₉
Base 10	663979₁₀	663991₁₀
Base 11	413948₁₁	413959₁₁
Base 12	2802b7₁₂	280307₁₂
Base 13	1a32b4₁₃	1a32c3₁₃
Base 14	133d91₁₄	133d9d₁₄
Base 15	d1b04₁₅	d1b11₁₅
Base 16	a21ab₁₆	a21b7₁₆