  We review recent measurements of the properties of the top quark by the CDF
and D0 experiments: the mass and decay width of the top quark, the ratio
$R=\btwb/\btwq$, the total production cross section of \ttbar\ pairs, the
helicity of the $W$ boson, anomalous couplings at the $Wtb$ vertex, the
asymmetry of $\ttbar$ production due to the colour charge, and the first study
of the top quark polarisation. The measurements are performed using data
samples of up to 8.7 \fb\ acquired by the CDF and D0 experiments in Run II of
the Fermilab Tevatron $p\bar p$ collider at a centre-of-mass energy of $\sqrt
s=1.96 \TeV$.
