Compare 81649 vs 81661

Property	81649	81661
Type	prime	semiprime
Unique factors	1	2
Total factors	1	2
Prime factorization	81649¹	127¹ × 643¹
Prime factorization	81649	127 × 643
Divisors count	2	4
Divisors	1, 81649	1, 127, 643, 81661
Number of properties	4	1
Lucky primes	1076th
Primes	7986th
Pythagorean primes	3979th
Semiprimes		19279th
Twin primes (2nd member)	1028th
Roman numberals
Base 2	10011111011110001₂	10011111011111101₂
Base 3	11011000001₃	11011000111₃
Base 4	103323301₄	103323331₄
Base 5	10103044₅	10103121₅
Base 6	1430001₆	1430021₆
Base 7	460021₇	460036₇
Base 8	237361₈	237375₈
Base 9	134001₉	134014₉
Base 10	81649₁₀	81661₁₀
Base 11	56387₁₁	56398₁₁
Base 12	3b301₁₂	3b311₁₂
Base 13	2b219₁₃	2b228₁₃
Base 14	21a81₁₄	21a8d₁₄
Base 15	192d4₁₅	192e1₁₅
Base 16	13ef1₁₆	13efd₁₆