1097

1097 is a natural number that comes after 1096 and before 1098. It is an odd number and, in mathematics, it is a prime number, meaning its only positive divisors are 1 and 1097. In Roman numerals, 1097 is written as MXCVII.

In number theory, 1097 is congruent to 1 modulo 4, which implies it can be expressed as a sum of two squares. Indeed, 1097 = 29^2 + 16^2. This aligns with a known property that primes congruent to 1 modulo 4 can be represented as the sum of two squares, with representations unique up to order and sign.

As a year, 1097 CE saw notable activity during the First Crusade. The Crusaders advanced into Asia Minor and captured the city of Nicaea in 1097, an event that helped shape the campaign through Anatolia and contributed to subsequent movements toward the Levant. The year also featured various political and military developments in medieval Europe and the Byzantine Empire, though details vary by region.

See also 1097 (disambiguation).