479

479 is a natural number that follows 478 and precedes 480. It is an odd prime number, meaning its only positive divisors are 1 and 479. Consequently, it has no nontrivial factorization. In decimal notation, its digits are 4, 7, and 9, which sum to 20.

In binary, 479 is 111011111, and in hexadecimal it is 0x1DF. In Roman numerals it is written as CDLXXIX. These representations are used in various fields such as computer science and number theory, where alternative bases and numeral systems are routinely considered.

As a year designation, 479 can refer to the year CE 479 or to 479 BCE, placing it in late antiquity or the classical era, respectively. When used as a calendar year, 479 denotes a point in history rather than a specific event by itself.

In telecommunications, 479 is the North American area code for northwestern and north central Arkansas, including cities such as Fayetteville, Fort Smith, Springdale, and Rogers. It is part of the North American Numbering Plan and is used to designate local telephone numbers in that region.