0791

0791 is a number most commonly encountered as a telephone area code in the People’s Republic of China. It designates Nanchang, the capital city of Jiangxi Province, and its surrounding urban and rural districts.

In domestic dialing within China, the area code is typically prefixed with a 0, so a Nanchang number would begin with 0791. When calling from outside China, the leading 0 is dropped and the number is dialed with the country code, such as +86 791 followed by the local number.

Numerically, 0791 equals the integer 791. The prime factorization of 791 is 7 × 113, so it is a composite number.

In computing, a leading zero can indicate octal notation in some programming languages. Because 9 is not a valid octal digit, 0791 would be invalid as an octal constant and could produce a parsing error in such contexts.

As a plain code or identifier, 0791 may appear in various contexts—such as model numbers, product codes, or catalog identifiers—without a single universal meaning beyond its numerical value and its use as an area code in China.