249

249 is a natural number that follows 248 and precedes 250. It is an odd composite number with prime factorization 3 × 83. Its divisors are 1, 3, 83, and 249.

In numeral systems, 249 is represented as 11111001 in binary, F9 in hexadecimal, and 371 in octal. In Roman numerals, it is written as CXLIX.

In the calendar, 249 is the 249th day of a common year; it falls on September 6. In leap years, it falls on September 5.

The designation 249 appears in several domains. The international dialing code +249 is assigned to Sudan. The main-belt asteroid 249 Ilse is a celestial object designated with the number 249.

Historically, the year 249 CE occurred during the Crisis of the Third Century in the Roman Empire, a period marked by political instability and frequent changes of ruler. The year is noted for the broader context of military and administrative challenges facing the empire at the time.