Word.ws English Dictionary

happy numbers

happy numbers is the plural of happy number.

Meaning of happy number

Noun

happy number (plural happy numbers)

  1. Any number that eventually reaches 1 after some number of iterations of replacing each of its digits by the sum of that digit's squares.
    • 13 is a happy number because 1² + 3² is 10, and 1² + 0² is 1.

Questions about happy numbers

What is happy numbers the plural of?
Happy numbers is the plural of happy number.

Words near happy numbers in the dictionary

  1. Happy Mondays
  2. happy Near Year
  3. happy New Year
  4. Happy New Year's
  5. happy number
  6. happy numbers
  7. happy panda
  8. happy pandas
  9. happy path
  10. happy paths
  11. happy pill

Source and license

Adapted from Wiktionary: happy numbers (page history and authors); happy number (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “happy numbers.” Word.ws, https://word.ws/happy_numbers. Based on Wiktionary, CC BY-SA 4.0.