433

433 is a prime number.

433 has a representation as a sum of two squares: 433 = 12² + 17².

431 and 433 form a twin prime pair.

433 is the hypotenuse of a primitive Pythagorean triple: 433² = 145² + 408².

The last 433 digits of 433⁴³³ form a prime number.

433⁴ = 35152125121 and 035 + 152 + 125 + 121 = 433.

433 Eros was the first Near-Earth asteroid to be discovered.

Source: Prime Curios!