abstract:A Friedman number is an integer which, in a given base, is the result of an expression using all its own digits in combination with any of the four basic arithmetic operators (+, −, ×, ÷) and sometimes exponentiation. For example, 347 is a Friedman number since 347 = 73 + 4.
Inother words, while notminimizing the scope of the problem, Friedman notes that any smallchange in its definitioncan haveprofound consequences in the numberof people who are considered obese.