Fatto generale: 17609 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 17609 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 17609 is an uninteresting number.
Data storica: March 17th is the day in 1973 that the Pulitzer Prize-winning photograph Burst of Joy is taken, depicting a former prisoner of war being reunited with his family.