1688313 has 12 divisors (see below), whose sum is σ = 2474864. Its totient is φ = 1023000.

The previous prime is 1688311. The next prime is 1688317. The reversal of 1688313 is 3138861.

It is not a de Polignac number, because 1688313 - 2¹ = 1688311 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1688311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1963 + ... + 2688.

2^1688313 is an apocalyptic number.

It is an amenable number.

1688313 is a deficient number, since it is larger than the sum of its proper divisors (786551).

1688313 is a wasteful number, since it uses less digits than its factorization.

1688313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4676 (or 4665 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 1688313 is about 1299.3509918417. The cubic root of 1688313 is about 119.0741951918.

The spelling of 1688313 in words is "one million, six hundred eighty-eight thousand, three hundred thirteen".