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The Number 1891: Properties and Meanings
Prime Factors of
1891=
31x
61.
1891 is a
Triangular Number.
1891 is a
Hexagonal Number.
1891 is a
Centered Triangular Number.
1891 is a
Centered Pentagonal Number.
1891 is a
Centered Nonagonal Number.
1891 is a
Centered 18-gonal Number.
The Year 1891 AD
In the year
1891 AD there was a Neptune-Pluto conjunction in Gemini.
In the year
1891 AD Jesse W. Reno invented the escalator.
In the year
1891 AD Helena Blavatsky died.(
Esoteric History)
In the year
1891 AD Arthur Edward Waite joined the Hermetic Order of the Golden Dawn.(
Esoteric History)