General fact: 2697 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 2697 is the smallest value of n for which n and 5n together use each digit 1-9 exactly once.
Trivia: 2697 is an unremarkable number.
Historical date: May 20th is the day in 1609 that Shakespeare's sonnets are first published in London, perhaps illicitly, by the publisher Thomas Thorpe.