Explanation of something related to solving $\phi(x) =m$
1970
Inverse Euler totient function
137982
Show that $\textbf{ZF}$ shows $\phi$ is $\Delta_1$
138819
Prove that $\phi(n) \geq \sqrt{n}/2$
20397
In RSA, why is it important to choose e so that it is coprime to φ(n)?
61073
Why is electric flux defined as $\Phi = E \cdot S$?
157213
Application of Luca's theorem
123036
Is the equation $x = \phi(n), x=2k, n,k \in \mathbb{Z}$, where $\phi(n)$ is the Euler totient function, solvable for all evens?
84930
How to justify $\phi(n) \ge \sqrt{n}$
79024
the derivation of E(X|X)
21339
IF $f(x) = \int_{0}^{\phi (x)} g(t) dt$, How could we find $f'(x)$?
82921
Uniqueness of $k$th root mod $m$ if $(k, \phi(m)) = 1$.
53426
Proof of a formula involving Euler's totient function: $\varphi (mn) = \varphi (m) \varphi (n) \cdot \frac{d}{\varphi (d)}$
149774
Help me understand the proof for Bolzano-Weierstrass Theorem!
52951
Find all $n \in \mathbb{Z^+}$ such that $\phi(n)=4$
43152
Why do we use Φ while calculating the encryption key in RSA method?
28057
Deriving $p = mv$ from translational symmetry (momentum conservation law)?
15000
Show that number of elements in $(Z/nZ)^*$ is $\phi (n)$