Order 1728.
668 conjugacy classes of subgroups.
The subgroup lattice has 332 nodes — too large to display as a diagram.
Splittings G = N ⋊ H with N normal; H ≅ G/N.
| N | H ≅ G/N | type |
|---|---|---|
| 54. C9×Dic6 | Q8 | semidirect |
| 56. #5721 | C9 | direct (N × H) |
| 217. C3×C9 | #557 | semidirect |
| 244. Dic6 | Q8×C9 | semidirect |
| 295. C9 | #5721 | direct (N × H) |
| 326. C3 | C9×#557 | semidirect |
By isomorphism type — maximal subgroups of the same type appear once, whether or not they are normal.
| subgroup | index |
|---|---|
| C3×C9×C4⋊Q8 | 2 |
| Q8×C9×Dic3 | 2 |
| C9×#944 | 2 |
| C9×#890 | 2 |
| C9×#889 | 2 |
| C9×#887 | 2 |
| C4×C9×Dic6 | 2 |
| C3×#5721 | 3 |
| C9×#557 | 3 |