8809

8809 = 23 x 383.

8809 is the 10³ lucky number (A181382).

The last four digits of 8809 in base three (110002021) match the first four digits of 8809 in base 4 (2021221).

8809 is a number n such that n times n + 9 gives the concatenation of two numbers m and m - 5 (A116258).

Source: OEIS