83623935

Appears in sequences

• Solutions to 2*phi(x) = x+1.at n=5A050474
• Fixed points when the function f(x) = phi(x) + floor(x/2) is iterated, i.e., solutions to f(x) = x.at n=31A097029
• Numbers k such that k^k == -1 (mod phi(k)).at n=25A177012
• Composite numbers in A182140 but not in A071700.at n=14A182221
• Numbers k such that phi(k) divides k+1, where phi is Euler's totient function (A000010).at n=6A203966
• Odd numbers n such that 2^n == phi(n) (mod n).at n=8A277626