sql - Joining with a column of type varchar that has both string and numbers stored in it -

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i have column in table of type varchar(50) stores both words , ids. example there values such as: 50, 95, example, testing....

when not isnumeric(column), can use value. when isnumeric(column), need join table value supposed selected.

i got select part down: 

select case when isnumeric(column) = 1 othertable.name else column end

now trying join under same scenario:

left join othertable ot on cast(column int) = t.id

this not work because cast not work when column word. need join if column number.

i not fan of using 1 column store 2 different datatypes took on existing database don't have choice.

in case better cast int varchar other way round:

 left join othertable ot on column = cast(t.id varchar(10))

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