General fact: 47823 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 47823 is an unremarkable number.
Trivia: 47823 is a boring number.
Historical date: December 7th is the day in 1930 that W1XAV in Boston, Massachusetts broadcasts video from the CBS radio orchestra program, The Fox Trappers.