706 = 2 x 353.
706 has a representation as a sum of two squares: 706 = 92 + 252.
706 is 424 in base 13.
706 is a Smith number because the sum of its digits is equal to the sum of the digits of its factorization: 7 + 0 + 6 = 2 + 3 + 5 + 3 = 13.
706 is the sum of two nonzero fourth powers: 706 = 54 + 34.
Source: Wikipedia