Compare 991981 vs 991988

Property	991981	991988
Type	prime	composite number
Unique factors	1	2
Total factors	1	3
Prime factorization	991981¹	2² × 247997¹
Prime factorization	991981	2 × 2 × 247997
Divisors count	2	6
Divisors	1, 991981	1, 2, 4, 247997, 495994, 991988
Number of properties	6	0
Additive primes	29905th
Chen primes	29751st
Emirps	10998th
Primes	77925th
Sexy primes (1st member)	16280th
Twin primes (2nd member)	8113th
Roman numberals
Base 2	11110010001011101101₂	11110010001011110100₂
Base 3	1212101202001₃	1212101202022₃
Base 4	3302023231₄	3302023310₄
Base 5	223220411₅	223220423₅
Base 6	33132301₆	33132312₆
Base 7	11301034₇	11301044₇
Base 8	3621355₈	3621364₈
Base 9	1771661₉	1771668₉
Base 10	991981₁₀	991988₁₀
Base 11	618321₁₁	618328₁₁
Base 12	3ba091₁₂	3ba098₁₂
Base 13	289693₁₃	28969a₁₃
Base 14	1bb71b₁₄	1bb724₁₄
Base 15	148dc1₁₅	148dc8₁₅
Base 16	f22ed₁₆	f22f4₁₆