Compare 31981 vs 31989

Property	31981	31989
Type	prime	semiprime
Unique factors	1	2
Total factors	1	2
Prime factorization	31981¹	3¹ × 10663¹
Prime factorization	31981	3 × 10663
Divisors count	2	4
Divisors	1, 31981	1, 3, 10663, 31989
Number of properties	5	1
Emirps	697th
Isolated primes	2450th
Long primes	1300th
Primes	3431st
Pythagorean primes	1705th
Semiprimes		7947th
Roman numberals
Base 2	111110011101101₂	111110011110101₂
Base 3	1121212111₃	1121212210₃
Base 4	13303231₄	13303311₄
Base 5	2010411₅	2010424₅
Base 6	404021₆	404033₆
Base 7	162145₇	162156₇
Base 8	76355₈	76365₈
Base 9	47774₉	47783₉
Base 10	31981₁₀	31989₁₀
Base 11	22034₁₁	22041₁₁
Base 12	16611₁₂	16619₁₂
Base 13	11731₁₃	11739₁₃
Base 14	b925₁₄	b92d₁₄
Base 15	9721₁₅	9729₁₅
Base 16	7ced₁₆	7cf5₁₆