Hecho matemático: 7473 is a Tribonacci-like number starting from 1, 1, and 1.
Trivia: 7473 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: June 16th is the day in 1745 that Sir William Pepperell captures the French Fortress of Louisbourg in Louisbourg, Nova Scotia during the War of the Austrian Succession.