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The Number 169: Properties and Meanings

Prime Factors of 169=13x13.

691 is a Square Number(13x13).

169 is a Centered Hexagonal Number.

169 is a Centered Octagonal Number.

169 is a Centered 28-gonal Number.

The Chemical Element Thulium has a Stable Isotope with 169 neutrons.


The Year 169 AD

In the year 169 AD ...

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