443

Number
$443$ (four hundred and forty-three) is:


 * The $86$th prime number


 * The $24$th Sophie Germain prime after $2$, $3$, $5$, $11$, $23$, $29$, $41$, $53$, $83$, $89$, $113$, $131$, $173$, $179$, $191$, $233$, $239$, $251$, $281$, $293$, $359$, $419$, $431$:
 * $2 \times 443 + 1 = 887$, which is prime.