Compare 11981 vs 11991

Property	11981	11991
Type	prime	composite number
Unique factors	1	3
Total factors	1	3
Prime factorization	11981¹	3¹ × 7¹ × 571¹
Prime factorization	11981	3 × 7 × 571
Divisors count	2	8
Divisors	1, 11981	1, 3, 7, 21, 571, 1713, 3997, 11991
Number of properties	7	0
Chen primes	735th
Emirps	325th
Isolated primes	968th
Long primes	561st
Primes	1437th
Pythagorean primes	707th
Sexy primes (1st member)	462nd
Roman numberals
Base 2	10111011001101₂	10111011010111₂
Base 3	121102202₃	121110010₃
Base 4	2323031₄	2323113₄
Base 5	340411₅	340431₅
Base 6	131245₆	131303₆
Base 7	46634₇	46650₇
Base 8	27315₈	27327₈
Base 9	17382₉	17403₉
Base 10	11981₁₀	11991₁₀
Base 11	9002₁₁	9011₁₁
Base 12	6b25₁₂	6b33₁₂
Base 13	55b8₁₃	55c5₁₃
Base 14	451b₁₄	4527₁₄
Base 15	383b₁₅	3846₁₅
Base 16	2ecd₁₆	2ed7₁₆