599

599 is a natural number that follows 598 and precedes 600. It is an odd integer and, in mathematics, it is a prime number, meaning its positive divisors are exactly 1 and 599. Because 599 is congruent to 3 modulo 4, it cannot be expressed as the sum of two squares.

In various numeral systems, 599 can be represented as follows: in binary it is 1001010111, in octal 1127, in hexadecimal 0x257, and in Roman numerals it is written as DXCIX.

In astronomy, 599 Luisa is a main-belt asteroid discovered in 1906 by Auguste Charlois. It is designated by the number 599 and is part of the catalog of minor planets. The name Luisa is the chosen designation for this object.

As a simple, well-defined integer, 599 also serves as a reference point in discussions about prime numbers, number theory, and numeral representations. Its properties illustrate how a single number can be characterized by divisibility, modular arithmetic, and multiple numeral systems, while also appearing in real-world naming of celestial bodies.