Fatto generale: 1629 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 1629 is an icosahedral number.
Trivia: 1629 is an unremarkable number.
Data storica: June 16th is the day in 1972 that the largest single-site hydro-electric power project in Canada is inaugurated at Churchill Falls, Labrador.