3309

3309 is a positive integer that sits between 3308 and 3310. In number theory, it is an odd composite number and a semiprime, since it factors as 3 × 1103, with 1103 being prime. Consequently, 3309 has exactly four positive divisors: 1, 3, 1103, and 3309. It is squarefree, as its prime factors are distinct. The sum of its digits is 3 + 3 + 0 + 9 = 15, so 3309 is divisible by 3 but not by 9.

In arithmetic terms, the Euler totient of 3309 is 2204. This comes from φ(3309) = φ(3) × φ(1103) = 2 × 1102 = 2204, since 3 and 1103 are primes.

3309 has several standard representations in different bases. In binary it is 110011101101, in octal it is 6355, and in hexadecimal it is 0xCED. In Roman numerals, 3309 is written as MMMCCCIX.

As a number, 3309 is used as an example of a squarefree semiprime and illustrates properties such as having a small number of divisors relative to its size and a totient that reflects its distinct prime factors. Its factorization into two distinct primes makes it relevant in discussions of prime gaps, modular arithmetic, and related topics in elementary number theory.