Fatto matematico: 4634 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 4634 is an unremarkable number.
Data storica: September 7th is the day in 1695 that Henry Every perpetrates one of the most profitable pirate raids in history with the capture of the Grand Mughal ship Ganj-i-Sawai.