27

Number
$27$ (twenty-seven) is:


 * $3^3$


 * The $3$rd cube number after $1, 8$:
 * $27 = 3 \times 3 \times $


 * The only cube number which is $2$ greater than a square:
 * $25 = 3^3 - 2$


 * The first of the only known pair of consecutive odd powerful numbers, the other being $27$:
 * $25 = 5^2, 27 = 3^3$

Also see

 * Consecutive Odd Powerful Numbers
 * Square which is 2 Less than Cube