Fatto generale: 4497 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 4497 is an uninteresting number.
Trivia: 4497 is a boring number.
Data storica: April 23rd is the day in 1955 that the Canadian Labour Congress is formed by the merger of the Trades and Labour Congress of Canada and the Canadian Congress of Labour.