Fatto generale: 829 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 829 is a value of n for which p(n) is the product of the digits of n.
Trivia: 829 is an unremarkable number.
Data storica: April 8th is the day in 1975 that President Richard Nixon signs into law federal legislation authorizing the establishment of Voyageurs National Park in northern Minnesota.