Friedman number

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At a glance

Class

Notion

Domain

Science and technology

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What Wikipedia says

A Friedman number is an integer, which represented in a given numeral system, is the result of a non-trivial expression using all its own digits in combination with any of the four basic arithmetic operators (+, −, ×, ÷), additive inverses, parentheses, exponentiation, and concatenation.

Excerpt from the Wikipedia article “Friedman number”, under the CC BY-SA 4.0 license. Read the article on Wikipedia