688439223 has 8 divisors (see below), whose sum is σ = 1019910000. Its totient is φ = 458959464.

The previous prime is 688439209. The next prime is 688439231. The reversal of 688439223 is 322934886.

It is not a de Polignac number, because 688439223 - 2¹⁶ = 688373687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688439203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12748848 + ... + 12748901.

It is an arithmetic number, because the mean of its divisors is an integer number (127488750).

Almost surely, 2^688439223 is an apocalyptic number.

688439223 is a deficient number, since it is larger than the sum of its proper divisors (331470777).

688439223 is a wasteful number, since it uses less digits than its factorization.

688439223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25497758 (or 25497752 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 688439223 is about 26238.1253712989. The cubic root of 688439223 is about 882.9888142018.

The spelling of 688439223 in words is "six hundred eighty-eight million, four hundred thirty-nine thousand, two hundred twenty-three".