Order 1728.
670 conjugacy classes of subgroups.
The subgroup lattice has 338 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. #5567 | C9 | direct (N × H) |
| 221. C3×C9 | #557 | semidirect |
| 249. Dic6 | Q8×C9 | semidirect |
| 301. C9 | #5567 | direct (N × H) |
| 332. C3 | C9×#557 | semidirect |
By isomorphism type — maximal subgroups of the same type appear once, whether or not they are normal.
| subgroup | index |
|---|---|
| C3×C4×Q8×C9 | 2 |
| C9×#944 | 2 |
| C9×#889 | 2 |
| C9×#887 | 2 |
| C9×#870 | 2 |
| C9×#869 | 2 |
| C4×C9×Dic6 | 2 |
| C3×#5567 | 3 |
| C9×#557 | 3 |