math_fact: 4653 is a value of n for which n and 6n together use each digit 1-9 exactly once.
trivia: 4653 is an unremarkable number.
historical_date: September 26th is the day in 1997 that an earthquake strikes the Italian regions of Umbria and the Marche, causing part of the Basilica of St. Francis at Assisi to collapse.