Select the odd one out from the following.

Let's examine the numbers given in the options:
* $17$, $23$, and $11$ are all prime numbers (divisible only by $1$ and themselves).
* $63$ is a composite number since it has multiple factors other than $1$ and itself ($3\times 21=63$, $7\times 9=63$).

Therefore, $63$ is the odd one out.