\[\boxed{\mathbf{1493}\mathbf{.}}\]
\[y = x^{3} - x + 1;\]
\[Пересекает\ ось\ Oy:\]
\[x_{0} = 0.\]
\[y^{'}(x) = \left( x^{3} \right)^{'} - (x - 1)^{'} =\]
\[= 3x^{2} - 1;\]
\[y^{'}(0) = 3 \bullet 0^{2} - 1 = 0 - 1 = - 1.\]
\[Ответ:\ \ k = - 1.\]