The primary functions of sun deities in various mythologies include representing light, warmth, and life. Sun deities are often associated with creation, growth, and fertility, reflecting the sun's essential role in sustaining life on Earth. Additionally, they are seen as guardians of time and the seasons, overseeing cyclical changes in nature. Different cultures have revered sun gods, attributing aspects like power and authority to them, symbolizing the human reliance on the sun for survival and prosperity.