Order 1458.
118 conjugacy classes of subgroups.
| subgroup | G/H | |
|---|---|---|
| center, hypercenter | C27 | AGL(1,ℤ/9) |
| commutator, hypocenter | C9 | C2×C3×C27 |
| Frattini | C3×C9 | C32×D3 |
| Fitting | C27×3−1+2 | C2 |
| socle | C32 | C3×D3×C9 |
| prime radical | C3×AGL(1,ℤ/9) | C9 |
| cosocle | C92 | C2×C32 |
| LCS | G ▷ C9 | |
| UCS | C1 ◁ C27 | |
Splittings G = N ⋊ H with N normal; H ≅ G/N.
| N | H ≅ G/N | type |
|---|---|---|
| 1. C27×3−1+2 | C2 | semidirect |
| 4. D9⋊C27 | C3 | semidirect |
| 5. D9×C27 | C3 | semidirect |
| 9. C9⋊C27 | C2×C3 | semidirect |
| 12. C9×C27 | C2×C3 | semidirect |
| 35. AGL(1,ℤ/9) | C27 | direct (N × H) |
| 43. 3−1+2 | C2×C27 | semidirect |
| 56. C27 | AGL(1,ℤ/9) | direct (N × H) |
| 62. D9 | C3×C27 | semidirect |
| 73. C9 | C2×C3×C27 | semidirect |
By isomorphism type — maximal subgroups of the same type appear once, whether or not they are normal.
| subgroup | index |
|---|---|
| C27×3−1+2 | 2 |
| C3×D3×C27 | 3 |
| C9×AGL(1,ℤ/9) | 3 |
| D9⋊C27 | 3 |
| D9×C27 | 3 |