197

This number is a prime.

A self-referential (or auto-descriptive) sentence due to Lee Sallows consists of a prime number of letters: "This sentence contains one hundred and ninety-seven letters: four a’s, one b, three c’s, five d’s, thirty-four e’s, seven f’s, one g, six h’s, twelve i’s, three l’s, twenty-six n’s, ten o’s, ten r’s, twenty-nine s’s, nineteen t’s, six u’s, seven v’s, four w’s, four x’s, five y’s, and one z." [Beedassy]