# zbMATH — the first resource for mathematics

On the set of values of the Euler function. (Russian) Zbl 1052.11502
The Euler function $$\varphi(m)$$ expresses the number of natural numbers in an interval $$[1,m]$$ that are coprime to $$m$$. Some results concerning solutions of the functional equation $$\varphi(x)=n$$ are proved.
##### MSC:
 11A25 Arithmetic functions; related numbers; inversion formulas 11A41 Primes
Euler function
Full Text: