983

983 is a natural number that comes after 982 and before 984. In mathematics, it is a prime number, meaning it has exactly two positive divisors: 1 and itself. It is odd, and the sum of its digits is 20, so it is not divisible by 3.

In base representations, 983 is written as 1111010111 in binary and 0x3D7 in hexadecimal. In Roman numerals it is CMLXXXIII.

As a prime number, 983 can be used as an example in discussions of primality testing, modular arithmetic, and prime gaps. It is congruent to -17 modulo 1000, which can be a handy property in certain arithmetic problems.

Beyond mathematics, 983 may appear as a year or a catalog number; there is no widely recognized event universally attributed to the number.