98999901

Appears in sequences

• Nontrivial reversal numbers (numbers which are integer multiples of their reversals), excluding palindromic numbers and multiples of 10.at n=11A031877
• 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=23A071685
• Numbers whose square is the concatenation of two numbers k and k-2.at n=10A115442
• Numbers (not ending in 0) which are 9 times their digit-reversal.at n=5A222814