This graph is one of two rank-3 strongly regular graphs with parameters $(3906,780,154,156)$ the other being the $\mathrm{O}_7(5)$ graph.
| Number of vertices: | $3906$ |
| Diameter: | $2$ |
| Intersection array: | $\{780,625;1,156\}$ |
| Spectrum: | $780^1 24^{2015} (-26)^{1890}$ |
| Automorphism group: | $\mathrm{PS_p}(6,5):2$ |
| Distance-transitive: | Yes |
| Primitive |