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New posts in totient-function
Values taken by Euler's phi function
elementary-number-theory
totient-function
Help to prove that $ U_{p} $ is a cyclic group.
abstract-algebra
group-theory
finite-groups
cyclic-groups
totient-function
totient function series diverges?
sequences-and-series
number-theory
totient-function
An integer is prime iff $\phi(n) \mid n-1$ and $n+1 \mid \sigma (n)$
divisibility
totient-function
divisor-sum
elementary-number-theory
A conjecture: for all $n\in\mathbb{N}$, the least $k>1$ such that $\phi(k)\geqslant n$ is a prime
number-theory
totient-function
Finite-order elements of $\text{GL}_4(\mathbb{Q})$
abstract-algebra
group-theory
totient-function
cyclotomic-polynomials
linear-groups
Properties of the euler totient function
elementary-number-theory
prime-numbers
totient-function
Proving $P(n) =n^{\phi(n)} \prod\limits_{d \mid n} \left(\frac{d!}{d^d} \right)^{\mu(n/d)}$
number-theory
totient-function
mobius-inversion
Group with exactly $n$ elements of order $n$, then $n$ has at most two prime divisors
abstract-algebra
group-theory
prime-numbers
totient-function
Prove that $\phi(n) \geq \sqrt{n}/2$
elementary-number-theory
inequality
totient-function
Euler totient function sum of divisors. Theorem 2.2 Apostol
elementary-number-theory
analytic-number-theory
totient-function
For what $k\in\mathbb{N}$ does the equation $\phi(n)=k$ has no solution? [duplicate]
elementary-number-theory
totient-function
What is the smallest value of $n$ for which $\phi(n) \ne \phi(k)$ for any $k<n,$ where $n=4m$?
number-theory
totient-function
Number of positive integers $\le n$ which are a multiple of $p$
prime-numbers
totient-function
inversion of the Euler totient function
number-theory
totient-function
Show that $\phi(mn) = \phi(m)\phi(n)\frac{d}{\phi(d)}$ [duplicate]
elementary-number-theory
totient-function
How to calculate these totient summation sums efficiently?
number-theory
totient-function
Updates on Lehmer's Totient Problem
number-theory
totient-function
Why is $f(x) = x\phi(x)$ one-to-one?
elementary-number-theory
totient-function
Proving formula involving Euler's totient function
abstract-algebra
number-theory
elementary-number-theory
totient-function
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