6729

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Number

$6729$ (six thousand, seven hundred and twenty-nine) is:

$3 \times 2243$

$6729$ and its double contain all the digits from $1$ to $9$ between them:

$2 \times 6729 = 13 \, 458$

Also see

• Integer and its Double forming Pandigital Pair

Sources

• 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $6729$
• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $6729$