Also, \(\sqrt{15241578750190521}=123456789\)
\(100000000+20000000+3000000+400000+50000+6000+700+80+9=123456789\)
\(666666666-543209877=123456789\)
\((\sqrt{123456790}+1)(\sqrt{123456790}-1)=123456789\)
\(123456789+0=123456789 \)
\(123456789\times1=123456789\)