\[\boxed{\mathbf{379.}}\]
\[1000 - 4 = 996\]
\[1000 - 6 = 994\]
\[1000 - 9 = 991\]
\[1000 - 47 = 953\]
\[1000 - 12 = 988\]
\[1000 - 63 = 937\]
\[1000 - 172 = 828\]
\[1000 - 458 = 542\]
\[1000 - 341 = 659\]