557057

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=20A007755
• Smallest prime p such that n = A049108(p) = length of chain of iterates of Euler Phi starting with p.at n=19A060611
• Prime factors of the odd terms of A007755.at n=13A092873
• A007318 * A131055.at n=16A131056
• Smallest k such that phi(phi(k)) = 2^n, where phi is the Euler totient function.at n=17A184968
• Primes having only {0, 5, 7} as digits.at n=35A260827
• Primes that have exactly 3 ones in both their binary and ternary expansions.at n=20A280997
• Primes of the form 2^r * 17^s + 1.at n=9A291049
• Primes of the form 17*2^n + 1.at n=1A300407
• Primes p of the form of the form q*2^h + 1, where q is one of the Fermat primes; Primes p for which A329697(p) == 2.at n=12A334092
• The prime terms of A225563.at n=43A335120
• Prime numbersat n=45859