4,490,639

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Number

$4 \, 490 \, 639$ (four million, four hundred and ninety thousand, six hundred and thirty-nine) is:

The $315 \, 347$th prime number

The $3$rd term of the smallest Cunningham chain of the first kind of length $7$:

$1 \, 122 \, 659$, $2 \, 245 \, 319$, $4 \, 490 \, 639$, $8 \, 981 \, 279$, $17 \, 962 \, 559$, $35 \, 925 \, 119$, $71 \, 850 \, 239$

Also see

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