Fatto generale: 2943 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2943 is the smallest value of n for which n and 6n together use each digit 1-9 exactly once.
Trivia: 2943 is a boring number.
Data storica: January 21st is the day in 1968 that a B-52 bomber crashes near Thule Air Base, contaminating the area after its nuclear payload ruptures.