Compare 991981 vs 991999

Property	991981	991999
Type	prime	prime
Unique factors	1	1
Total factors	1	1
Prime factorization	991981¹	991999¹
Prime factorization	991981	991999
Divisors count	2	2
Divisors	1, 991981	1, 991999
Number of properties	6	4
Additive primes	29905th
Chen primes	29751st
Emirps	10998th	10999th
Isolated primes		61702nd
Lucky primes		8558th
Primes	77925th	77927th
Sexy primes (1st member)	16280th
Twin primes (2nd member)	8113th
Roman numberals
Base 2	11110010001011101101₂	11110010001011111111₂
Base 3	1212101202001₃	1212101202201₃
Base 4	3302023231₄	3302023333₄
Base 5	223220411₅	223220444₅
Base 6	33132301₆	33132331₆
Base 7	11301034₇	11301061₇
Base 8	3621355₈	3621377₈
Base 9	1771661₉	1771681₉
Base 10	991981₁₀	991999₁₀
Base 11	618321₁₁	618338₁₁
Base 12	3ba091₁₂	3ba0a7₁₂
Base 13	289693₁₃	2896a8₁₃
Base 14	1bb71b₁₄	1bb731₁₄
Base 15	148dc1₁₅	148dd4₁₅
Base 16	f22ed₁₆	f22ff₁₆