Order 486.
108 conjugacy classes of subgroups.
| subgroup | G/H | |
|---|---|---|
| center, hypercenter | C3×C9 | D9 |
| commutator, hypocenter | C9 | C2×C3×C9 |
| Frattini | C32 | C32×D3 |
| Fitting | C3×C92 | C2 |
| socle | C33 | C3×D3 |
| prime radical | C32×D9 | C3 |
| cosocle | C3×C9 | C2×C32 |
| LCS | G ▷ C9 | |
| UCS | C1 ◁ C3×C9 | |
Splittings G = N ⋊ H with N normal; H ≅ G/N.
| N | H ≅ G/N | type |
|---|---|---|
| 1. C3×C92 | C2 | semidirect |
| 4. C9×D9 | C3 | direct (N × H) |
| 9. C92 | C2×C3 | semidirect |
| 13. C3×D9 | C9 | direct (N × H) |
| 22. C3×C9 | D9 | direct (N × H) |
| 23. C3×C9 | C2×C9 | semidirect |
| 30. D9 | C3×C9 | direct (N × H) |
| 40. C9 | C3×D9 | direct (N × H) |
| 41. C9 | C2×C3×C9 | semidirect |
| 47. C3 | C9×D9 | direct (N × H) |
By isomorphism type — maximal subgroups of the same type appear once, whether or not they are normal.
| subgroup | index |
|---|---|
| C3×C92 | 2 |
| C3×D3×C9 | 3 |
| C32×D9 | 3 |
| C9×D9 | 3 |