I'm reading in a book:
While the rest energy contained in an electron, $ 8.19\cdot10^{-14} J $, may seem ridiculously small, on the atomic scale it is tremendous. Compare our answer to $10^{-19} J $, the energy gained or lost by a single atom during a typical chemical reaction. The rest energy of an electron is about 1,000,000 times larger!
I think the numbers are so small that I'm having trouble having an intuitive understanding of it the part "1,000,000 times larger". Isn't 100,000 times larger a closer answer?
$$ 10^{-19} \cdot 10^{5} = 10^{-14} < 8.19\cdot10^{-14} $$