6915878971

Appears in sequences

• Smallest prime which is 1 more than a product of n distinct primes: a(n) is a prime and a(n) - 1 is a squarefree number with n prime factors.at n=10A073918
• Primes p at which phi(p-1)/(p-1) reaches a new minimum, where phi is Euler's totient function.at n=19A241196
• Numbers n such that phi(n)/phi(phi(n)) > phi(m)/phi(phi(m)) for all m < n.at n=14A289125
• Numbers k such that uphi(k)/uphi(uphi(k)) > uphi(m)/uphi(uphi(m)) for all m < k, where uphi is the unitary totient function (A047994).at n=10A289127