Fatto matematico: 9377 is a value of n for which n, 2n, 3n, and 4n all use the same number of digits in Roman numerals.
Trivia: 9377 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: September 2nd is the day in 1811 that the University of Oslo is founded as The Royal Fredericks University, after Frederick VI of Denmark and Norway.