  We report the analysis of high-precision space-based photometric and
high-resolution spectroscopic observations of HD 180347. The high-quality light
curves from the Transiting Exoplanet Survey Satellite (TESS) under sectors 14,
15, and 26 were used. By visual inspection of the light curves and the Fourier
transforms, only low-frequency signals (less than 1 d$^{-1}$) were detected.
After using wavelet, autocorrelation, and composite spectrum analyses, HD
180347 is classified as a rotational variable with a period of about 4.1 $\pm$
0.2 days. In reference to the observation limit of TESS, no pulsations were
detected. For the spectroscopic analysis, we used data collected with the High
Efficiency and Resolution Mercator \'{E}chelle Spectrograph (HERMES). We
determined the spectral type of this star and obtained atmospheric parameters
such as the effective temperature, the surface gravity, and the projected
rotational, microturbulent, and radial velocities. We performed a detailed
chemical abundance analysis. The LTE abundances were derived for 25 chemical
elements. For 13 of them, including Ca, Sc, Sr, Zr, and Ba, which are important
for the characterisation of chemical peculiarity, we also present the non-local
thermodynamic equilibrium (NLTE) abundances. NLTE improves the accuracy of the
derived abundances and confirms that Ca and Sc are depleted in HD 180347
relative to their solar abundances, while the heavy elements beyond Sr are
enhanced, by more than 0.7 dex. Based on the spectral class and the element
abundance pattern, we classify this star as Am (kA1hA8mA8).
