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Nontotient


A positive even value of n for which phi(x)=n, where phi(x) is the totient function, has no solution. The first few are 14, 26, 34, 38, 50, ... (OEIS A005277).


See also

Noncototient, Totient Function

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References

Guy, R. K. Unsolved Problems in Number Theory, 2nd ed. New York: Springer-Verlag, p. 91, 1994.Sloane, N. J. A. Sequence A005277/M4927 in "The On-Line Encyclopedia of Integer Sequences."

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Nontotient

Cite this as:

Weisstein, Eric W. "Nontotient." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Nontotient.html

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