603

603 is a natural number that comes after 602 and before 604. In mathematics, it is an odd composite number with prime factorization 3^2 × 67. It is divisible by 3 and 9. The digit sum is 9, and in various bases it can be written as 1001011011 in binary and 0x25B in hexadecimal; the Roman numeral representation is DCIII.

As a year, 603 CE falls in the early seventh century. Historical records from this period are regionally varied, and cross-cultural summaries are limited.

In the North American Numbering Plan, 603 is the area code for the state of New Hampshire. Established in 1947 as part of the original plan, it has long covered the entire state.

In astronomy, 603 Timandra is a main-belt asteroid discovered in 1906 by August Kopff. It is named after Timandra, a figure in Greek mythology.

In popular culture and technology, 603 appears as a model number in consumer electronics, such as the Nokia 603 mobile phone released in 2011.

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