Hecho matemático: 6939 is a value of n for which 3n and 5n together use each digit exactly once.
Trivia: 6939 is an unremarkable number.
Fecha histórica: December 30th is the day in 1816 that the Treaty of St. Louis (1816) between the United States and the united Ottawa, Ojibwa, and Potawatomi Indian tribes is proclaimed.