thirty-seven vs 37

thirty-seven and 37 both are adjectives.

Word	Noun	Adjective	Verb	Adverb
thirty-seven	No	Yes	No	No
37	No	Yes	No	No

As adjectives, thirty-seven and 37 are synonyms defined as:

Other synonyms of thirty-seven include xxxvii.

thirty-seven (adjective)	37 (adjective)
being seven more than thirty	being seven more than thirty