Fatto generale: 1189 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 1189 is the square root of a triangular number.
Trivia: 1189 is an uninteresting number.
Data storica: April 3rd is the day in 1860 that the first successful United States Pony Express run from Saint Joseph, Missouri to Sacramento, California begins.