997

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Number

$997$ (nine hundred and ninety-seven) is:

The $168$th prime number

The $19$th obstinate number after $1$, $127$, $149$, $251$, $331$, $337$, $373$, $509$, $599$, $701$, $757$, $757$, $809$, $877$, $905$, $907$, $959$, $977$

The $23$rd of $29$ primes of the form $2 x^2 + 29$:

$2 \times 22^2 + 29 = 997$ (Previous  ... Next)

The $46$th near-repdigit prime after $101$, $113$, $131$, $151$, $\ldots$, $727$, $733$, $757$, $773$, $787$, $797$, $811$, $877$, $881$, $883$, $887$, $911$, $919$, $929$, $977$, $991$

The $54$th left-truncatable prime after $2$, $3$, $5$, $7$, $\ldots$, $743$, $773$, $797$, $823$, $853$, $883$, $937$, $947$, $953$, $967$, $983$

Also see

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