563

Number
$563$ (five hundred and sixty-three) is:


 * The $103$rd prime number


 * The $3$rd and largest known Wilson prime after $5$, $13$:
 * $563^2 \divides \paren {563 - 1}! + 1$


 * The $9$th balanced prime after $5$, $53$, $157$, $173$, $211$, $257$, $263$, $373$:
 * $563 = \dfrac {557 + 569} 2$


 * The $19$th safe prime after $5$, $7$, $11$, $23$, $47$, $59$, $83$, $107$, $167$, $179$, $227$, $263$, $347$, $359$, $383$, $467$, $479$, $503$:
 * $563 = 2 \times 281 + 1$