85

Number
$85$ (eighty-five) is:


 * $5 \times 17$


 * The $27$th semiprime:
 * $85 = 5 \times 17$


 * The $3$rd positive integer after $50, 65$ which can be expressed as the sum of two square numbers in two or more different ways:
 * $85 = 9^2 + 2^2 = 7^2 + 6^2$