Prabhakarvardhan was a Samanta ruler in the beginning but later on had declared himself as independent. He is the first king of the Vardhana dynasty who is referred as `Maharajadhiraj` and `Param-bhattaraka`.

Madhuban inscription describes him as a king whose fame had spread beyond the four seas. According to some scholars including the Hunas of Punjab, the Gujars of Rajoutana, the Latas of Singh and the kings of Gandhara and Malava had accepted his suzerainty. But these accounts seem to be highly exaggerated. According to a scholar, the empire of Prabhakarvardhan was limited to Thaneshwara only. Others say that the south era Punjab and eastern Rajputana were also included in his empire,

Prabhakarvardhan had two sons namely Rajyavardhan and Harshavardhan. He has also one daughter, Rajyasri. Prabhakarvardhan was a worshipper of sun. Historians have opined that Prabhakarvardhan was a staunch devotee of sun.