Beaming effect is important for the observational properties of blazars .
In this work , we collect 91 Fermi blazars with available radio Doppler factors . \gamma -ray Doppler factors are estimated and compared with radio Doppler factors for some sources .
The intrinsic ( de-beamed ) \gamma -ray flux density ( f ^ { in } _ { \gamma } ) , intrinsic \gamma -ray luminosity ( L ^ { in } _ { \gamma } ) , and intrinsic synchrotron peak frequency ( \nu _ { p } ^ { in } ) are calculated .
Then we study the correlations between f ^ { in } _ { \gamma } and redshift and find that they follow the theoretical relation : \log f = -2.0 \log z + { const } .
When the subclasses are considered , we find that stationary jets are perhaps dominant in low synchrotron peaked blazars .
63 Fermi blazars with both available short variability time scales ( \Delta T ) and Doppler factors are also collected .
We find that the intrinsic relationship between L ^ { in } _ { \gamma } and \Delta T ^ { in } obeys the Elliot & Shapiro and the Abramowicz & Nobili relations .
Strong positive correlation between f _ { \gamma } ^ { in } and \nu _ { p } ^ { in } is found , suggesting that synchrotron emissions are highly correlated with \gamma -ray emissions .