277

277 is a natural number that follows 276 and precedes 278. It is a prime number, and it is the 59th prime. As such, its only positive divisors are 1 and 277.

In number theory, 277 is congruent to 1 modulo 4, hence by the theorem on sums of two squares it can be written as the sum of two squares. One representation is 277 = 9^2 + 14^2.

In various base representations, 277 equals 0x115 in hexadecimal, 425 in octal, and 100010101 in binary. In Roman numerals, 277 is written as CCLXXVII.

As a prime of the form 4k+1, 277 is of interest in certain areas of number theory and serves as a common example in discussions of prime numbers that can be expressed as a sum of two squares. Outside pure mathematics, 277 may appear as an identifier in catalogs, models, or designations, though such uses are context-dependent and not intrinsic to the number itself.