This number is a prime.
"Legal Deposit" was introduced in Denmark in 1697, when a royal ordinance ordered all printers to deposit five copies of everything they printed with the Royal Library. (In 1781 is was extended to the entire kingdom: then including Norway, Iceland, Greenland, Faroe Islands and the Duchies of Slesvig and Holstein.) [Caldwell]
The word “pantheism” was invented in 1697 by English mathematician Joseph Raphson. He believed the universe to be immeasurable in respect to a human's capacity of understanding, and that humans will never be able to comprehend it.
The last Maya city (Nojpetén) fell in 1697. [Davies]