140417

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=18A007755
• Smallest prime p such that n = A049108(p) = length of chain of iterates of Euler Phi starting with p.at n=17A060611
• Primes p such that 128p+1 and (p-1)/128 are both prime.at n=2A086477
• Prime factors of the odd terms of A007755.at n=12A092873
• Primes p such that 2^j+p^j are primes for j=0,1,2,4.at n=22A094487
• Prime numbersat n=13044