987,654,321

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Number

$987 \, 654 \, 321$ is:

$3^2 \times 17^2 \times 379 \, 721$

Remains penholodigital when multiplied by $2$, $4$, $5$, $7$ and $8$

Also see

• Penholodigital Properties of 987,654,321

Sources

• 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $987,654,321$
• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $987,654,321$