433

433 is a natural number that follows 432 and precedes 434. It is a prime number, and in decimal notation it is a three-digit integer. In different numeral bases, 433 is 110110001 in binary, 0x1B1 in hexadecimal, and 0o661 in octal. In Roman numerals it is written as CDXXXIII.

In mathematics, being prime means 433 has no positive divisors other than 1 and itself. It is odd and greater than 2, and it appears in various mathematical contexts as a single, indivisible unit within the integers.

In sports, 4-3-3 (often written as 433) refers to a football (soccer) formation with four defenders, three midfielders, and three forwards. The setup supports width and attacking options and has been used by many teams to pursue an aggressive, high-pressing style. Notable adopters include clubs that emphasize fluid attacking movement and a strong front line.

In wireless technology, 433 MHz denotes a widely used ISM (industrial, scientific and medical) radio frequency band for unlicensed devices. Modules operating in this band are common in remote controls, weather sensors, and other low-power wireless equipment. Operation within the band is subject to regional regulations regarding transmission power and usage.

The number 433 also appears in Roman numerals as CDXXXIII, and as a decimal representation it is a three-digit integer with various mathematical and practical applications in different fields.