2743

2743 is a natural number that follows 2742 and precedes 2744. In mathematics, it is an odd composite number and, more specifically, a semiprime because its prime factorization is 13 × 211.

Representations: In binary, 2743 equals 101010110111; in hexadecimal, AB7; in Roman numerals, MMDCCXLIII. The digit sum is 16, so it is not divisible by 3 or 9, and it is not a multiple of 5. It is not a perfect square or a cube.

Context and usage: As a semiprime with two relatively large prime factors, 2743 is sometimes cited in introductory number theory as an accessible example for factoring exercises. It is odd and congruent to 1 mod 3, and it is 3 mod 4 as 2740 is divisible by 4 leaving remainder 3, so 2743 ≡ 3 mod 4.

Calendar usage: The number 2743 may appear in discussions of historical or fictional calendars as a year label, either in CE or BCE, but without specific context its interpretation is broad.