Fatto matematico: 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!).
Data storica: October 1st is the day in 1982 that Helmut Kohl replaces Helmut Schmidt as Chancellor of Germany through a Constructive Vote of No Confidence.