2747

2747 is a positive integer that is composite, specifically a semiprime, since it factors as the product of two distinct primes: 41 and 67. Accordingly, its divisors are 1, 41, 67, and 2747. The decimal digits sum to 20, so it is not divisible by 3, and as an odd number it is not divisible by 2 or 5. The prime factorization is unique: 2747 = 41 × 67.

Representations and related properties: In Roman numerals, 2747 is written as MMDCCXLVII. In binary, it is 101010111011, and in hexadecimal it is 0xABB. The Euler totient function yields φ(2747) = (41−1)(67−1) = 2640, and the number of positive divisors is four. As a semiprime, 2747 is sometimes cited in discussions of primality testing and integer factorization, illustrating numbers that have exactly two prime factors.