Fatto matematico: 8991 is the smallest number so that it and its successor are both the product of a prime and the 5^{th} power of a prime.
Trivia: 8991 is a boring number.
Data storica: August 12th is the day in 2007 that the bulk carrier M/V New Flame collides with the oil tanker Torm Gertrud at the southernmost tip of Gibraltar, ending up partially submerged.