RSA encryption and decryption not resulting to the correct result? I'm having a hard time creating a functioning RSA algorithm for some reason even though I have all the steps right (or at least I think I do). So I have the following :

I picked prime numbers, $p$ and $q$ as:

$$p = 13691$$
$$q = 29387$$

I picked $n$ as $p \cdot q$
$$n = 402337417$$

So 
$$\phi(n) = 402294340$$

I picked a random $e$ between $1$ and $\phi(n)$
$e = 46117$

My message was
$M=3$

I got $d$ by the Extended Euclidean Algorithm as the following:
$d= 7795$

When I do the encryption using $M^e \,\text{mod}\, n$ I get: $c= 399797630$

When I do the decryption using $C^d \,\text{mod}\, n$, I get $243069037$, which is not $M = 3$?

Any idea what can be the reason behind this? My guess is that $d$ is incorrect.
Your $d$ is wrong, double check your EEA calculation. You picked up the wrong Bezout coefficient from $7795\times 402294340 - 67998447\times 46117 =1$. You should use
$d= -67998447 \equiv 334295893 \pmod {\phi(n)}.$