Order 504.
48 conjugacy classes of subgroups.
| subgroup | G/H | |
|---|---|---|
| center, hypercenter | C4×C7 | D9 |
| commutator, hypocenter | C9 | C2×C4×C7 |
| Frattini | C2×C3 | C2×D3×C7 |
| Fitting | C4×C7×C9 | C2 |
| socle | C2×C3×C7 | C2×D3 |
| prime radical | C2×C7×D9 | C2 |
| cosocle | C2×C9 | C22×C7 |
| LCS | G ▷ C9 | |
| UCS | C1 ◁ C4×C7 | |
Splittings G = N ⋊ H with N normal; H ≅ G/N.
| N | H ≅ G/N | type |
|---|---|---|
| 2. C4×C7×C9 | C2 | semidirect |
| 3. C7×Dic9 | C2 | semidirect |
| 6. C7×D9 | C4 | direct (N × H) |
| 10. C4×D9 | C7 | direct (N × H) |
| 11. C7×C9 | C2×C4 | semidirect |
| 16. C4×C9 | C2×C7 | semidirect |
| 17. Dic9 | C2×C7 | semidirect |
| 20. C4×C7 | D9 | direct (N × H) |
| 24. D9 | C4×C7 | direct (N × H) |
| 30. C9 | C2×C4×C7 | semidirect |
| 32. C7 | C4×D9 | direct (N × H) |
| 37. C4 | C7×D9 | direct (N × H) |
By isomorphism type — maximal subgroups of the same type appear once, whether or not they are normal.
| subgroup | index |
|---|---|
| C2×C7×D9 | 2 |
| C4×C7×C9 | 2 |
| C7×Dic9 | 2 |
| C4×D3×C7 | 3 |
| C4×D9 | 7 |