Compare 661981 vs 661987

Property	661981	661987
Type	semiprime	prime
Unique factors	2	1
Total factors	2	1
Prime factorization	103¹ × 6427¹	661987¹
Prime factorization	103 × 6427	661987
Divisors count	4	2
Divisors	1, 103, 6427, 661981	1, 661987
Number of properties	1	5
Additive primes		20970th
Chen primes		21009th
Isolated primes		42127th
Primes		53716th
Semiprimes	141648th
Sexy primes (1st member)		11599th
Roman numberals
Base 2	10100001100111011101₂	10100001100111100011₂
Base 3	1020122001211₃	1020122002001₃
Base 4	2201213131₄	2201213203₄
Base 5	132140411₅	132140422₅
Base 6	22104421₆	22104431₆
Base 7	5424655₇	5424664₇
Base 8	2414735₈	2414743₈
Base 9	1218054₉	1218061₉
Base 10	661981₁₀	661987₁₀
Base 11	4123a1₁₁	4123a7₁₁
Base 12	27b111₁₂	27b117₁₂
Base 13	1a2408₁₃	1a2411₁₃
Base 14	133365₁₄	13336b₁₄
Base 15	d1221₁₅	d1227₁₅
Base 16	a19dd₁₆	a19e3₁₆