This number is a prime.
123486373 = 172^2 + 123456789. It is the smallest emirp of the form n^2 plus first zeroless pandigital number. [Bajpai]
123486373 = 172^2 + 123456789. It is the smallest emirp of
the form n^2 plus first zeroless pandigital number. [Bajpai]