823

Number
$823$ (eight hundred and twenty-three) is:


 * The $143$rd prime number.


 * The larger of the $32$nd pair of twin primes:
 * $823 - 821 = 2$


 * The $46$th left-truncatable prime after $2$, $3$, $5$, $7$, $\ldots$, $443$, $467$, $523$, $547$, $613$, $617$, $643$, $647$, $653$, $673$, $683$, $743$, $773$, $797$


 * The $51$st long period prime after $7$, $17$, $19$, $23$, $29$, $\ldots$, $701$, $709$, $727$, $743$, $811$, $821$

Also see