Hecho matemático: 6849 is a value of n for which 2n and 3n together use each digit exactly once.
Trivia: 6849 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: October 1st is the day in 1989 that Denmark introduces the world's first legal modern same-sex civil union called "registered partnership".