87

Number
$87$ (eighty-seven) is:


 * $3 \times 29$


 * The $29$th semiprime:
 * $87 = 3 \times 29$


 * The $20$th lucky number:
 * $1, 3, 7, 9, 13, 15, 21, 25, 31, 33, 37, 43, 49, 51, 63, 67, 73, 75, 79, 87, \ldots$