Compare 1661 vs 1681

Property	1661	1681
Type	semiprime	semiprime
Unique factors	2	1
Total factors	2	2
Prime factorization	11¹ × 151¹	41²
Prime factorization	11 × 151	41 × 41
Divisors count	4	3
Divisors	1, 11, 151, 1661	1, 41, 1681
Number of properties	1	1
Semiprimes	479th	484th
Roman numberals	MDCLXI	MDCLXXXI
Base 2	11001111101₂	11010010001₂
Base 3	2021112₃	2022021₃
Base 4	121331₄	122101₄
Base 5	23121₅	23211₅
Base 6	11405₆	11441₆
Base 7	4562₇	4621₇
Base 8	3175₈	3221₈
Base 9	2245₉	2267₉
Base 10	1661₁₀	1681₁₀
Base 11	1280₁₁	1299₁₁
Base 12	b65₁₂	b81₁₂
Base 13	9aa₁₃	9c4₁₃
Base 14	869₁₄	881₁₄
Base 15	75b₁₅	771₁₅
Base 16	67d₁₆	691₁₆