which texts on number theory do you recommend? my close friend intend to study number theory 
and he asked me if i know a good text on it , so i thought that you guys can help me to help him !
he look for a text for the beginners and for a first course
he will study it as a self study .. 
so what texts do you recommend ? 
are there any lectures or videos online on internet can help them ?? 
also , what do you advice him ? 

My two pennyworth: for introductory books try ...


*

*John Stillwell, Elements of Number Theory (Springer 2002). This is by a masterly expositor, and is particularly approachable.

*G.H. Hardy and E.M. Wright, An Introduction to the Theory of Numbers (OUP 1938, and still going strong with a 6th edition in 2008). Also aimed at beginning undergraduate mathematicians and pleasingly accessible.

*Alan Baker, A Comprehensive Course in Number Theory (CUP 2012) is a nice recent textbook (shorter than its title would suggest, too).

