math_fact: 6819 is 20457 / 3, and each digit is contained in the equation exactly once.
trivia: 6819 is an unremarkable number.
historical_date: September 1st is the day in 1604 that Adi Granth, now known as Guru Granth Sahib, the holy scripture of Sikhs, was first installed at Harmandir Sahib.