This number is a prime.
The smallest prime that is pandigital in Roman numerals, i.e., using each of the symbols I, V, X, L, C, D, and M at least once. [Post]
The very first literary work (titled "Yongbi och'on ka") to have used the present Korean alphabet was written in 1447. Reference: Cho D.I., Bouchez D. (2002) Histoire de la littérature coréenne. Fayard, p. 154. [Olry]
The number of delegates required by GOP rules to vote for Trump at the convention.