8371

8371 = 11 x 761.

8371 is a centered 18-gonal number (A069131).

8371 is a number of the form n² - n - 1 (n = 92) for which the sum of the digits (19) is also a number of the form n² - n - 1 (n = 5) (A117746).

8371 divides 67⁵ - 1.

Source: On-Line Encyclopedia of Integer Seqences