37391

Appears in sequences

• Numbers k such that sigma(k) = sigma(k+8).at n=31A015876
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 47 ones.at n=3A031815
• Composite numbers k = concat(MSD(k),x) such that k' = x', where k' is the arithmetic derivative of k.at n=9A293477
• Composite numbers k = concat(MSD(k),x) such that the sum of the aliquot parts of k is equal to the sum of the aliquot parts of x.at n=9A293479