208

Number
$208$ (two hundred and eight) is:


 * $2^4 \times 13$


 * The $34$th happy number after $1, 7, 10, 13, 19, 23, \ldots, 130, 133, 139, 167, 176, 188, 190, 192, 193, 203$:
 * $208 \to 2^2 + 0^2 + 8^2 = 4 + 0 + 64 = 68 \to 6^2 + 8^2 = 36 + 64 = 100 \to 1^2 + 0^2 + 0^2 = 1$


 * The $6$th positive integer after $200, 202, 204, 205, 206$ that cannot be made into a prime number by changing just $1$ digit