const lines = require('fs').readFileSync('/dev/stdin', 'utf-8')
    .trim().split(' ').values();

const N = Number(lines.next().value)

if (N == 1) {
    console.log('NO');
    return;
}

for (let i = 2; i <= Math.sqrt(N); i++) {
    if (N % i == 0) {
        console.log('YES');
        return;
    }
}

console.log('NO');