Hecho general: 9817 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 9817 is a boring number.
Trivia: 9817 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: November 16th is the day in 1979 that the first line of Bucharest Metro (Line M1) is opened from Timpuri Noi to Semănătoarea in Bucharest, Romania.