Mongolian Digit Nine

᠙ denotes the quantity nine. The Mongolian numeral nine belongs to a set of ten digits derived from Tibetan numerals, so ༩ is its related Tibetan counterpart.

The standard Unicode account dates the creation of Mongolian script to around the beginning of the 13th century: it adapts Old Uyghur writing, itself adapted from Sogdian Aramaic writing, an Aramaic-derived script used for the Sogdian language. A 2023 article proposes instead that Mongols adopted Sogdian writing separately from the Uyghurs in the sixth–seventh centuries. The route is disputed; it concerns the script’s origin, not the Tibetan ancestry of its numerals.

A 2011 comparative-folklore study reads the number nine in The Secret History of the Mongols, a medieval historical text, as heaven’s number and a sign of great force and completeness. That symbolism belongs to nine in Mongolian folklore, not to a second arithmetic meaning of ᠙.

Why does ᠙ turn sideways?

Its value stays nine; the layout changes its orientation. In traditional vertical Mongolian, numbers read left to right across a column. Modern typography often turns them to follow the column’s top-to-bottom flow, so the same numeral can face a different way in another setting.