11353
This number is a prime.
A prime such that the sum of the squares of its digits is equal to the product of its digits. [Russo]
The smallest emirp made up of two palindromic primes: 11,
353. Note that the former is the digit sum of the latter,
as is exactly the case with the smallest palindromic prime
(17971) made up of two emirps: 17, 971; Moreover, 11353 is
a concatenation of two primes in another way: 113, 53. [Beedassy]
(There is one curio for this number that has not yet been approved by an editor.)
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