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The Number 1691: Properties and MeaningsPrime Factors of 1691=19x89.
1691 Oort is a main-belt asteroid discovered by Ingrid van Houten-Groeneveld and Karl Wilhelm Reinmuth at Heidelberg. It was named after the Dutch astronomer Jan Oort.
Aeroflot Flight 1691 crashed after a false fire warning near Moscow Vnukovo Airport.
The Year 1691 ADIn the year 1691 AD a fire at the Palace of Whitehall in London destroyed its Stone Gallery.
In the year 1691 AD Michel Rolle invented Rolle's theorem, an essential theorem of mathematics.
Share any properties and meanings for particular Numbers...contact me directly, thanks.