What is the mystery number it is a prime number it is greater than 14 square but less than 17 square the yhree digits added together make 14 one of the digits squared gives you one of the other dig?

Prime number between 196 and 289 whose digits add to 14?

Possibles 239, 248, 257, 266, 275, 284.

248, 266 and 284 are multiples of 2, 275 is a multiple of 5.

This leaves 239 and 257.

Only 239 has one digit which is the square of another.

So there you have it.