  The minimal Hamming distance between distinct $p$-ary bent functions of $2n$
variables is proved to be $p^n$ for any prime $p$. It is shown that the number
of $p$-ary bent functions at the distance $p^n$ from the quadratic bent
function is equal to $p^n(p^{n-1}+1)\cdots(p+1)(p-1)$ as $p>2$.
