  We have analyzed a large sample of clean blazars detected by Fermi Large Area
Telescope (LAT). Using literature and calculation, we obtained intrinsic
$\gamma$-ray luminosity excluding beaming effect, black hole mass, broad-line
luminosity (used as a proxy for disk luminosity), jet kinetic power from
"cavity" power and bulk Lorentz factor for parsec-scale radio emission, and
studied the distributions of these parameters and relations between them. Our
main results are as follows. (i) After excluding beaming effect and redshift
effect, intrinsic $\gamma$-ray luminosity with broad line luminosity, black
hole mass and Eddington ratio have significant correlations. Our results
confirm the physical distinction between BL Lacs and FSRQs. (ii) The
correlation between broad line luminosity and jet power is significant which
supports that jet power has a close link with accretion. Jet power depends on
both the Eddington ratio and black hole mass. We also obtain $LogL_{\rm
BLR}\sim(0.98\pm0.07)Log P_{\rm jet}$ for all blazars, which is consistent with
the theoretical predicted coefficient. These results support that jets are
powered by energy extraction from both accretion and black hole spin (i.e., not
by accretion only). (iii) For almost all BL Lacs, $P_{\rm jet}>L_{\rm disk}$;
for most of FSRQs, $P_{\rm jet}<L_{\rm disk}$. The "jet-dominance"
(parameterized as $\frac{P_{\rm jet}}{L_{\rm disk}}$) is mainly controlled by
the bolometric luminosity. Finally, the radiative efficiency of $\gamma$-ray
and properties of TeV blazars detected by Fermi LAT were discussed.
