81767

Appears in sequences

• Numbers k such that 4*10^k + 6*R_k - 3 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=33A099005
• Numbers such that 2*X^2-82 is a square.at n=11A133325
• Composite numbers n such that the distinct digits in n and the distinct digits in the proper divisors of n are the same.at n=36A237713
• Triangle read by rows: order of all-2s configuration on the n X k sandpile grid graph.at n=38A256045
• Numbers k such that the set of all the decimal digits of k is the same as the set of all the decimal digits of the proper divisors of k.at n=37A282755