3003003
3003003 is a natural number in base ten that has attracted attention for its symmetry and arithmetic properties. The number is a palindrome, read the same forwards and backwards, and its digit sum equals nine, making it divisible by 3. It is not a prime; its factorization begins with \(3^2 = 9\), after which the remaining factor \(333\,667\) is believed to be prime, though its primality has not been universally verified for all large sub‑factors.
Mathematically, 3003003 is also interesting as a product of consecutive integers: it equals \(3\,003\,003 = 3 \times
Outside pure number theory, 3003003 has been used as an identifier in a few cataloguing systems.
Overall, 3003003 is a modest but illustrative example of how simple numerical patterns can intersect with larger