Fatto generale: 1579 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 1579 is the smallest prime that remains prime when preceded and followed by one, two, three, or four 9's.
Trivia: 1579 is an unremarkable number.
Data storica: April 27th is the day in 1967 that Expo 67 officially opens in Montreal, Canada with a large opening ceremony broadcast around the world.