Fatto generale: 1693 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 1693 is a boring number.
Trivia: 1693 is an uninteresting number.
Data storica: August 19th is the day in 1895 that American frontier murderer and outlaw, John Wesley Hardin, is killed by an off-duty policeman in a saloon in El Paso, Texas.