Two inequalities involving the Euler totient function and the sum of the $k$-th powers of the divisors of balancing numbers are explored.
On a generalization of arithmetic functions and the Ramanujan sums
Ramanujan-Fourier series of certain arithmetic functions of two variables
On two conjectures of Sierpiński concerning the arithmetic functions $σ$ and $φ$
![QR code for arXiv:1803.05141 [math.NT]](http://oss.arxitics.com/images/favicon.svg)