143

Number
$143$ (one hundred and forty-three) is:


 * $11 \times 13$


 * Every positive integer can be expressed as the sum of at most $143$ positive $7$th powers.


 * The $58$th (strictly) positive integer after $1$, $2$, $3$, $\ldots$, $95$, $96$, $102$, $108$, $114$, $119$, $120$, $125$ which cannot be expressed as the sum of distinct primes of the form $6 n - 1$

Also see

 * Hilbert-Waring Theorem for $7$th Powers