688636023 has 16 divisors (see below), whose sum is σ = 939375360. Its totient is φ = 448587776.

The previous prime is 688636009. The next prime is 688636027. The reversal of 688636023 is 320636886.

It is a cyclic number.

It is not a de Polignac number, because 688636023 - 2⁴ = 688636007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688636027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17911 + ... + 41207.

It is an arithmetic number, because the mean of its divisors is an integer number (58710960).

Almost surely, 2^688636023 is an apocalyptic number.

688636023 is a deficient number, since it is larger than the sum of its proper divisors (250739337).

688636023 is a wasteful number, since it uses less digits than its factorization.

688636023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23526.

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 688636023 is about 26241.8753712459. The cubic root of 688636023 is about 883.0729444281.

The spelling of 688636023 in words is "six hundred eighty-eight million, six hundred thirty-six thousand, twenty-three".