It has around 800,000 speakers
Nowaadys, Yucatec Maya is written using the Latin script, introduced during the conquest of Yucatán by the Spanish in the 16th century.
Before the arrival of the Conquistadors, it was written using Mayan glyphs.
Although Glyphs were displaced by the Spanish writing system, Glyphs were only ever written and understood by an educated elite, and so Maya is historically an oral language. This in part explains why there is no standardised orthography. In other words Maya words when written will have different spellings depending on who's writing them.
The Spanish Cuatro 'four' and cinco 'five' are widely used by Maya speakers instead of kan and ho. See uchicago.edu.
Translations kindly provided by Erica Matos-Lindsey.