Hecho general: 10347 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 10347 is a boring number.
Trivia: 10347 is a boring number.
Fecha histórica: April 29th is the day in 1882 that the "Elektromote" – forerunner of the trolleybus – is tested by Ernst Werner von Siemens in Berlin.