For a spontaneous reaction the $\Delta G^{\circ }$, equilibrium constant ($K$) and $E_{\text{cell}}^{\circ }$ will be respectively:

For a reaction to be spontaneous:Gibbs Free Energy ($\Delta G^{\circ }$): Must be negative ($\Delta G^{\circ }<0$).Electromotive Force ($E_{\text{cell}}^{\circ }$): Must be positive ($E_{\text{cell}}^{\circ }>0$), as $\Delta G^{\circ }=-nF{E}_{\text{cell}}^{\circ }$.Equilibrium Constant ($K$): Since $\Delta G^{\circ }=-RT\ln K$, for $\Delta G^{\circ }$ to be negative, $\ln K$ must be positive, which means $K>1$.