3373

This number is a prime.

3373 is the smaller in the only 4-digit emirp pair for which both are primes of the form 12p+1, where p is prime. [Nie]

OSHA Publication 3373 deals with hexavalent chromium, which was the primary subject in the movie Erin Brockovich played by Julia Roberts. [Goins]

The smallest prime (and only emirp) whose square is a concatenation of four double-digit primes, i.e., 11377129 = 3373^2. [Loungrides]

The distance in miles "as the crow flies" between York, England and New York City. [Homewood]

3373 is a prime number formed by concatenating the first four terms (digits) of the following sequence, where a(n) is the ending digit that occurs the most among the first 10^n primes. The sequence begins 3, 3, 7, 3, 7, 3, 7, 7, 7, 7, 3, 7, ... . [Honaker]