71304257

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=27A007755
• Smallest prime p such that n = A049108(p) = length of chain of iterates of Euler Phi starting with p.at n=26A060611
• Prime factors of the odd terms of A007755.at n=17A092873
• Smallest k such that phi(phi(k)) = 2^n, where phi is the Euler totient function.at n=24A184968
• Prime numbersat n=4190208