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Carmichael Numbers with a Square Totient
Published online by Cambridge University Press: 20 November 2018
Abstract
Let $\varphi$ denote the Euler function. In this paper, we show that for all large $x$ there are more than ${{x}^{0.33}}$ Carmichael numbers $n\,\le \,x$ with the property that $\varphi \left( n \right)$ is a perfect square. We also obtain similar results for higher powers.
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- Copyright © Canadian Mathematical Society 2009
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