688693 has 8 divisors (see below), whose sum is σ = 737120. Its totient is φ = 641520.

The previous prime is 688679. The next prime is 688697. The reversal of 688693 is 396886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 688693 - 2⁵ = 688661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1003 + ... + 1543.

It is an arithmetic number, because the mean of its divisors is an integer number (92140).

2⁶⁸⁸⁶⁹³ is an apocalyptic number.

It is an amenable number.

688693 is a deficient number, since it is larger than the sum of its proper divisors (48427).

688693 is a wasteful number, since it uses less digits than its factorization.

688693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627.

The product of its digits is 62208, while the sum is 40.

The square root of 688693 is about 829.8752918361. The cubic root of 688693 is about 88.3097298590.

The spelling of 688693 in words is "six hundred eighty-eight thousand, six hundred ninety-three".