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;
}

const primes = Array(N + 1).fill(true);

primes[0] = false;
primes[1] = false;

for (let i = 2; i <= Math.sqrt(N); i++) {
    if (primes[i]) {
        for (let j = i + i; j <= N; j += i) {
            primes[j] = false;
        }
    }
}

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

console.log('NO');