Order 216.
42 conjugacy classes of subgroups.
| # | subgroup | G/H | class size | multiplicity | normal? | properties |
|---|---|---|---|---|---|---|
| 1 | C3⋊Dic9 | C2 | 1 | 1 | yes | maximal, characteristic |
| 2 | C9×Dic3 | C2 | 1 | 1 | yes | maximal, characteristic |
| 3 | C3×Dic9 | C2 | 1 | 1 | yes | maximal, characteristic |
| 4 | #627 | — | 3 | 1 | no | maximal |
| 5 | Dic18 | — | 3 | 1 | no | maximal |
| 6 | C2×C3×C9 | C22 | 1 | 1 | yes | characteristic |
| 7 | C3⋊Dic3 | — | 3 | 1 | no | — |
| 8 | C3×Dic3 | — | 3 | 1 | no | — |
| 9 | C3×Dic3 | D3 | 1 | 1 | yes | characteristic |
| 10 | C4×C9 | — | 3 | 1 | no | — |
| 11 | Dic9 | — | 3 | 1 | no | — |
| 12 | Dic9 | — | 6 | 1 | no | — |
| 13 | Dic9 | D3 | 1 | 1 | yes | characteristic |
| 14 | C3×C9 | Q8 | 1 | 1 | yes | characteristic, complemented, Sylow |
| 15 | Dic6 | — | 9 | 1 | no | — |
| 16 | Dic6 | — | 9 | 1 | no | — |
| 17 | C2×C32 | C2×D3 | 1 | 1 | yes | characteristic |
| 18 | C2×C9 | — | 2 | 1 | no | — |
| 19 | C2×C9 | C2×D3 | 1 | 1 | yes | characteristic |
| 20 | C3×C4 | — | 3 | 1 | no | — |
| 21 | C3×C4 | — | 9 | 1 | no | — |
| 22 | Dic3 | — | 3 | 1 | no | — |
| 23 | Dic3 | — | 9 | 1 | no | — |
| 24 | Dic3 | — | 9 | 1 | no | — |
| 25 | Dic3 | — | 18 | 1 | no | — |
| 26 | Dic3 | D9 | 1 | 1 | yes | characteristic |
| 27 | C32 | Dic6 | 1 | 1 | yes | characteristic |
| 28 | C9 | — | 2 | 1 | no | — |
| 29 | C9 | Dic6 | 1 | 1 | yes | characteristic, complemented |
| 30 | Q8 | — | 27 | 1 | no | Sylow |
| 31 | C2×C3 | — | 2 | 1 | no | — |
| 32 | C2×C3 | C2×D9 | 1 | 1 | yes | characteristic |
| 33 | C2×C3 | D32 | 1 | 1 | yes | characteristic |
| 34 | C4 | — | 3 | 1 | no | — |
| 35 | C4 | — | 9 | 1 | no | — |
| 36 | C4 | — | 27 | 1 | no | — |
| 37 | C3 | — | 2 | 1 | no | — |
| 38 | C3 | Dic18 | 1 | 1 | yes | characteristic, complemented |
| 39 | C3 | #627 | 1 | 1 | yes | characteristic |
| 40 | C2 | D3×D9 | 1 | 1 | yes | characteristic |
| subgroup | G/H | |
|---|---|---|
| center, hypercenter | C2 | D3×D9 |
| commutator, Fitting, cosocle | C2×C3×C9 | C22 |
| Frattini | C2×C3 | D32 |
| socle, prime radical | C2×C32 | C2×D3 |
| hypocenter | C3×C9 | Q8 |
| LCS | G ▷ C2×C3×C9 ▷ C3×C9 | |
| UCS | C1 ◁ C2 | |
Splittings G = N ⋊ H with N normal; H ≅ G/N.
| N | H ≅ G/N | type |
|---|---|---|
| 14. C3×C9 | Q8 | semidirect |
| 29. C9 | Dic6 | semidirect |
| 38. C3 | Dic18 | semidirect |
By isomorphism type — maximal subgroups of the same type appear once, whether or not they are normal.
| subgroup | index |
|---|---|
| C3⋊Dic9 | 2 |
| C9×Dic3 | 2 |
| C3×Dic9 | 2 |
| #627 | 3 |
| Dic18 | 3 |