Bit Mode Significance
4000 Set user ID on execution
2000 Set group ID on execution
1000 Set sticky bit*
0400 Read by owner
0200 Write by owner
0100 Execute (search in directory) by owner
0040 Read by group
0020 Write by group
0010 Execute (search in a directory) by group
0004 Read by others
0002 Write by others
0001 Execute by others