587

587 is a natural number that comes after 586 and before 588. In mathematics, it is a prime number, meaning it has no positive divisors other than 1 and itself. It is the 107th prime in the sequence of primes and it is not a square or a cube. In Roman numerals, 587 is written as DLXXXVII.

In telecommunications, 587 is an area code in the North American Numbering Plan. It is used in the Canadian province of Alberta as an overlay to provide additional phone numbers, and it serves major cities such as Calgary and Edmonton along with surrounding regions. It coexists with other Alberta area codes, including 403, 780, and 825.

In calendar usage, 587 can refer to the year 587 CE in historical references; as with other three-digit numbers, it appears in cataloging, encoding, and numbering schemes across various disciplines. While most common associations with 587 are numerical or administrative, the number also appears in different contexts as a label or identifier.