10999989

Appears in sequences

• Numbers k such that 9*k = (k written backwards), k > 0.at n=5A001232
• Numbers k such that k written backwards is a nontrivial multiple of k.at n=9A008919
• Erroneous version of A001232.at n=4A039684
• Non-palindromic numbers n, not divisible by 10, such that either n divides R(n) or R(n) divides n, where R(n) is the digit-reversal of n.at n=17A071685
• Numbers k such that gcd(k^2, reverse(k^2)) = k.at n=32A175823
• Repunits with even indices multiplied by 99, i.e., 99*(11, 1111, 111111, 11111111, ...).at n=2A274755