688036823 has 4 divisors (see below), whose sum is σ = 688098768. Its totient is φ = 687974880.

The previous prime is 688036813. The next prime is 688036829. The reversal of 688036823 is 328630886.

688036823 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 328630886 = 2 ⋅164315443.

It is a cyclic number.

It is not a de Polignac number, because 688036823 - 2²² = 683842519 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 (688036829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9218 + ... + 38223.

It is an arithmetic number, because the mean of its divisors is an integer number (172024692).

Almost surely, 2^688036823 is an apocalyptic number.

688036823 is a deficient number, since it is larger than the sum of its proper divisors (61945).

688036823 is a wasteful number, since it uses less digits than its factorization.

688036823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61944.

The product of its (nonzero) digits is 331776, while the sum is 44.

The square root of 688036823 is about 26230.4560196730. The cubic root of 688036823 is about 882.8167419075.

The spelling of 688036823 in words is "six hundred eighty-eight million, thirty-six thousand, eight hundred twenty-three".