Compare 640691 vs 640699

Property	640691	640699
Type	prime	semiprime
Unique factors	1	2
Total factors	1	2
Prime factorization	640691¹	19¹ × 33721¹
Prime factorization	640691	19 × 33721
Divisors count	2	4
Divisors	1, 640691	1, 19, 33721, 640699
Number of properties	5	1
Chen primes	20397th
Cousin primes (2nd member)	5637th
Isolated primes	40853rd
Primes	52128th
Semiprimes		137290th
Sophie germain primes	5311th
Roman numberals
Base 2	10011100011010110011₂	10011100011010111011₂
Base 3	1012112212022₃	1012112212121₃
Base 4	2130122303₄	2130122323₄
Base 5	131000231₅	131000244₅
Base 6	21422055₆	21422111₆
Base 7	5305622₇	5305633₇
Base 8	2343263₈	2343273₈
Base 9	1175768₉	1175777₉
Base 10	640691₁₀	640699₁₀
Base 11	3a83a7₁₁	3a8404₁₁
Base 12	26a92b₁₂	26a937₁₂
Base 13	19580c₁₃	195817₁₃
Base 14	1296b9₁₄	1296c3₁₄
Base 15	c9c7b₁₅	c9c84₁₅
Base 16	9c6b3₁₆	9c6bb₁₆