# Ramanujan got convoluted

Let $$\mu$$ and $$\phi$$ be two number theoretic functions. Then

evaluate $(\mu * \phi) (1729)$

Notations :-

$$\phi$$ denotes Euler's Totient function.

$$\mu$$ denotes Möbius function.

$$*$$ denotes Dirichlet's convolution of two arithmetic functions.

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