353

This number is a prime.

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The only prime-digit palindromic prime that is the first of eight consecutive 3-digit primes, i.e., 353, 359, 367, 373, 379, 383, 389, 397 that remain primes if we delete their first digit, i.e., 53, 59, 67, 73, 79, 83, 89, 97. Note that the sum of the primes of the initial chain is 3000. [Loungrides]