Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus

The present disclosure provides an electrophotographic photosensitive member that reduces the accumulation of charge and the leakage which are caused by a repeated use in a long period of time. The electrophotographic photosensitive member has a support, an undercoat layer, a charge generation layer and a charge transport layer in this order, wherein the undercoat layer contains a polyamide resin, and a titanium oxide particle, wherein the titanium oxide particle has been surfacetreated with an organosilicon compound, wherein the undercoat layer satisfies 10≤α≤70, where α represents a degree [%] of hydrophobicity of the titanium oxide particle which has been surfacetreated with the organosilicon compound; and the undercoat layer satisfies 0.015≤(β×γ)≤0.040, where β represents an average primary particle size [μm] of the titanium oxide particles, and γ represents a weight percentage [wt %] of an Si element of the organosilicon compound with respect to the titanium oxide particle.