329

Number
$329$ (three hundred and twenty-nine) is:


 * $7 \times 47$


 * The $52$nd happy number after $1, 7, 10, 13, 19, 23, \ldots, 226, 230, 236, 239, 262, 263, 280, 291, 293, 301, 302, 310, 313, 319, 320, 326$:
 * $329 \to 3^2 + 2^2 + 9^2 = 9 + 4 + 36 = 94 \to 9^2 + 4^2 = 81 + 16 = 97 \to 9^2 + 7^2 = 81 + 49 = 130 \to 1^2 + 3^2 + 0^2 = 1 + 9 + 0 = 10 \to 1^2 + 0^2 = 1$