Fatto matematico: 905 is the smallest composite number that is not the sum of a prime and a power of 2.
Trivia: 905 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: June 23rd is the day in 1985 that a terrorist bomb aboard Air India flight 182 brings the Boeing 747 down off the coast of Ireland killing all 329 aboard.