Is number common noun or proper noun?

Answer 1

The noun number is a common noun, a word for any number of any kind. A word for a number is also a common noun, for example one, two, three, one hundred twenty three, etc.

A proper noun is the name of a specific person, place, thing, or a title; for example:

• Number Two, male character in the "Austin Powers" movie series
• Number Eight, female humanoid character in "Battlestar Galactica" TV series
• "Number 10", the headquarters of the Prime Minister of the United Kingdom
• Paterson Public School Number 21, Paterson, NJ
• "The Number 23", a 2003 movie with Jim Carrey
• "Number", a novel by Caryl Churchill