  Accurate and extensive atomic data are essential for spectroscopic analyses
of stellar atmospheres and other astronomical objects. We present energy
levels, lifetimes, and transition probabilities for neutral nitrogen, the sixth
most abundant element in the cosmos. The calculations employ the fully
relativistic multiconfiguration Dirac-Hartree-Fock and relativistic
configuration interaction methods, and span the 103 lowest states up to and
including 2s$^2$2p$^2$5s. Our theoretical energies are in excellent agreement
with the experimental data, with an average relative difference of 0.07%. In
addition, our transition probabilities are in good agreement with available
experimental and theoretical data. We further verify the agreement of our data
with experimental results via a re-analysis of the solar nitrogen abundance,
with the results from the Babushkin and Coulomb gauges consistent to 2% or 0.01
dex. We estimated the uncertainties of the computed transition data based on a
statistical analysis of the differences between the transition rates in
Babushkin and Coulomb gauges. Out of the 1701 computed electric dipole
transitions in this work, 83 (536) are associated with uncertainties less than
5% (10%).
