Hebrew Numerology. Hebrew numerology is based on the fact that Hebrew numbers are traditionally written by using letters of the Hebrew alphabet. Each Hebrew letter corresponds to a number, with no notation for zero. (Mystics like this fact, deriving much homiletic material from it, not least, that since there is a G-d, there is never nothing …). Because of this, numbers can spell words, and words add up to numerical values. Here's how Hebrew numerology works.