Mathematical fact: 5789 is a value of n for which n and 8n together use each digit 1-9 exactly once.
Trivia: 5789 is an uninteresting number.
Historical date: November 6th is the day in 1971 that the United States Atomic Energy Commission tests the largest U.S. underground hydrogen bomb, code-named Cannikin, on Amchitka Island in the Aleutians.