43

This number is a prime.

Just showing those entries submitted by 'Gupta': (Click here to show all)

The smallest non-palindromic prime which on subtracting its reverse gives a perfect square (i.e., 43 - 34 = 3^2). [Gupta]

The smallest prime formed from reverse concatenation of two consecutive numbers. [Gupta]

Smallest multidigit prime p such that the pth prime is palindromic. [Gupta]

The smallest prime p such that p!/[R(p)]!-1 is prime, where R(p) is the reversal of p. The next such prime is 1871. [Gupta]