4227137

Properties

Appears in sequences

• Smallest number m such that the trajectory of m under iteration of Euler's totient function phi(n) [A000010] contains exactly n distinct numbers, including m and the fixed point.at n=23A007755
• Smallest prime p such that n = A049108(p) = length of chain of iterates of Euler Phi starting with p.at n=22A060611
• Prime factors of the odd terms of A007755.at n=15A092873
• Primes of the form 81n^2 - 90n + 26.at n=23A144571
• Honaker primes of the form k^2 + 1.at n=10A176790
• Prime numbersat n=298106