1309

Number
$1309$ (one thousand, three hundred and nine) is:


 * $7 \times 11 \times 17$


 * The $1$st term of the $1$st triplet of consecutive positive integers all of which are sphenic:
 * $1309 = 7 \times 11 \times 17$, $1310 = 2 \times 5 \times 131$, $1311 = 3 \times 19 \times 23$