  The paper presents data on the muon component with a threshold
\(\varepsilon_{thr} \geq\) 1 GeV. Air showers were registered at the Yakutsk
array during almost 50 years of continuous air shower observations. The
characteristics of muons are compared with calculations of QGSjetII-04 and EPOS
LHC models for a proton and an iron nucleus. There is a muon deficit in the
models, at energies greater than 5 EeV. To make an agreement between
experimental data and simulations on muons, further tuning of the models is
required.
