961

Number
$961$ (nine hundred and sixty-one) is:
 * $31^2$


 * The $31$st square number after $1$, $4$, $9$, $16$, $25$, $36$, $\ldots$, $625$, $676$, $729$, $784$, $841$, $900$:
 * $961 = 31 \times 31$