1099989
domain: N
Appears in sequences
- Numbers k such that 9*k = (k written backwards), k > 0.at n=3A001232
- Numbers k such that k written backwards is a nontrivial multiple of k.at n=6A008919
- Divisors of 9999999999.at n=30A027895
- Erroneous version of A001232.at n=3A039684
- 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=12A071685
- Numbers k such that gcd(k^2, reverse(k^2)) = k.at n=27A175823
- Repunits with odd indices multiplied by 99, i.e., 99*(1, 111, 11111, 1111111, ...).at n=2A274743
- Numbers whose reciprocals have period 10.at n=15A345319