Classically, particles are described by mass, spin, and charge.
Can we consider then that particles are bundles of properties? For all particles which have the same value for these properties describe same kind of particle; for example - one cannot distinguish between one electron and another.
One could argue, additionally, that particles possess angular and linear momentum; and of position in space and in time; for no particle is found in the void - itself and nothing else.
But given that these values can vary; are they better expressed as extrinsic (or accidental) properties; and the former as intrinsic properties - properties that characterise the particle?
It's probably worth making clear that I'm considering electrons as bundles of properties as nothing to do with QM itself, or that they're beyond direct perception; but because there is a small number of definite intrinsic properties that picks out an electron - and all electrons thus picked out are indistinguishable; whereas humans can be picked out say by describing their biological nature we wouldn't then say one human is indistinguishable from another; the same goes for mugs, rocks and radios.