List questions from totient-function

Published on 26 Mar 2026 - 3:11

257

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partial sums of euler function through divisors

Published on 28 Nov 2016 - 22:16

295

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Series involving Euler totient function $\varphi(n)$

Published on 01 Dec 2016 - 3:07

174

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What is the remainder of ${{6457}^{76}}^{57}$ modulo $23$?

Published on 01 Dec 2016 - 9:04

136

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Find all $n \in \mathbb{Z^+} : \phi(n)=2$

Published on 04 Dec 2016 - 17:46

237

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Find all $n\in \mathbb{Z^+}, \ \phi (3n)=\phi (4n)=\phi (6n)$

Published on 05 Dec 2016 - 18:06

77

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Solutions to equation involving totient function

Published on 09 Dec 2016 - 0:33

663

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All numbers less than 100 with phi(n) = 64

Published on 11 Dec 2016 - 1:21

464

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Find some $n, k$ such that: $\phi(kn) = k * \phi(n)$

Published on 12 Dec 2016 - 5:45

99

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Eulers-phi function - calculating the last digit of a unending exponent

Published on 20 Dec 2016 - 0:00

146

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Find $a$ such that $83359654581 ... 10843035531 ^ a \equiv 1 \pmod{32003240081}$

Published on 20 Dec 2016 - 4:16

209

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How many integers are divisible by at least one of the numbers $4$,$ 7$ and $33$?

Published on 21 Dec 2016 - 4:30

222

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A question about Euler's Totient: $\frac1 {\phi(n)} = \frac1 n \sum_{d|n} \frac{\mu(d)^2}{\phi(d)}$

Published on 24 Dec 2016 - 21:34

385

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if the repetend length of $b\over a$ being larger or equal than $m-1$ then $m$ is prime?

Published on 24 Dec 2016 - 21:43

153

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When is $\displaystyle \phi(\sigma(n)) $ is a perfect square?

Published on 25 Mar 2026 - 17:38

List Question

Evaluating the sum $\sum_{k=1}^{n}{\frac{\mu(k)}{\phi(k)}} $

partial sums of euler function through divisors

Series involving Euler totient function $\varphi(n)$

What is the remainder of ${{6457}^{76}}^{57}$ modulo $23$?

Find all $n \in \mathbb{Z^+} : \phi(n)=2$

Find all $n\in \mathbb{Z^+}, \ \phi (3n)=\phi (4n)=\phi (6n)$

Solutions to equation involving totient function

All numbers less than 100 with phi(n) = 64

Find some $n, k$ such that: $\phi(kn) = k * \phi(n)$

Eulers-phi function - calculating the last digit of a unending exponent

Find $a$ such that $83359654581 ... 10843035531 ^ a \equiv 1 \pmod{32003240081}$

How many integers are divisible by at least one of the numbers $4$,$ 7$ and $33$?

A question about Euler's Totient: $\frac1 {\phi(n)} = \frac1 n \sum_{d|n} \frac{\mu(d)^2}{\phi(d)}$

if the repetend length of $b\over a$ being larger or equal than $m-1$ then $m$ is prime?

When is $\displaystyle \phi(\sigma(n)) $ is a perfect square?

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