62991

Appears in sequences

• Composite numbers with four prime factors (not necessarily distinct) whose concatenation yields a palindrome.at n=23A046453
• a(n) = (smallest n-digit number beginning with n and having prime signature of n)- (smallest n-digit number beginning with n).at n=7A086559
• G.f. A(x) satisfies: A(x - A(x)^3) = x + A(x)^2.at n=8A276366
• Numbers such that the decimal digits of sigma(n) are a permutation of those of sigma(n)-n.at n=24A277114