1688116 has 6 divisors (see below), whose sum is σ = 2954210. Its totient is φ = 844056.

The previous prime is 1688101. The next prime is 1688123. The reversal of 1688116 is 6118861.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1572516 + 115600 = 1254^2 + 340^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211011 + ... + 211018.

2^1688116 is an apocalyptic number.

It is an amenable number.

1688116 is a deficient number, since it is larger than the sum of its proper divisors (1266094).

1688116 is a wasteful number, since it uses less digits than its factorization.

1688116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422033 (or 422031 counting only the distinct ones).

The product of its digits is 2304, while the sum is 31.

The square root of 1688116 is about 1299.2751825537. The cubic root of 1688116 is about 119.0695636397.

The spelling of 1688116 in words is "one million, six hundred eighty-eight thousand, one hundred sixteen".