Erdős problem 828 · problems.science

Is it true that, for any $a \in \mathbb{Z}$ , there are infinitely many $n$ such that $\phi(n) | n + a$ ?

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Problem row: sha256:89bdf864a8b32ad5351c4b5814d81cc23ef325755fa15394cf6ca02fc7e98c5a
Metadata: sha256:1285e003f1b31e19b83601dd0ac7f73912c7009973a77d0f3483bfc1441495f1
Observation: sha256:8c823d621b7e1256c8e47c60a5f1c54c016a5507e6f27b2bab537f6f5f232067
Content: sha256:c4b220bd58b788e9ee4f7c2cfc995fd006d3017076c61ea1c2bd09e18efd10bd

Repository: sha256:a956b84c437202e5a02cc9e036a621bd14a302b34a75758115730bdbb77c52a4
Projection: sha256:c9d14c459c518937e758918b5897dc3b22f1a55f07739afe99502f5b046c907a
Source commit: 2415f78e850aeee50afdca525c6f2e0ea606f207