# Could I apply the master theorem if my \$ N / b \$ is \$ varphi (N) \$?

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$$T (N) = begin {cases} 1 & text {if} N = 1 \ T ( varphi (N)) + log ( varphi (N)) ^ 3 & text {otherwise} end {cases}$$

Can i somehow express $$varphi (N)$$ as $$N / b$$, to be able to apply the master theorem and solve this recurrence?