Prime Curios!: 19991

19991
(another Prime Pages' Curiosity)

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The smallest primemirp that is also an invertible prime. [Bhattacharya]

The larger of the only two five-digit palindromic primes formed from two primes (19 and 991), one of which is the sum of the digits of the other. [Silva]

The smallest palindromic prime that is the sum of 17 consecutive prime numbers (1109 + ... + 1231 = 19991). [Schuler]

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