60009

Appears in sequences

• a(n) = (10n+1)*(10n+9).at n=24A001535
• Numbers that look the same when rotated by 180 degrees, using only digits 0, 6 and 9.at n=11A111065
• Numbers that look the same when printed upside down.at n=23A111156
• Numbers that are the same upside down (using only digits 0, 1, 6 and 9).at n=31A169731
• Numbers n such that m=(n^2+1)/2, p=(m^2+1)/2 and q=(p^2+1)/2 are all prime.at n=27A188546
• Smallest m such that A259043(m) = n.at n=47A259046
• Strobogrammatic nonpalindromic numbers.at n=28A287092