688089031 has 16 divisors (see below), whose sum is σ = 793658880. Its totient is φ = 584359200.

The previous prime is 688089013. The next prime is 688089041. The reversal of 688089031 is 130980886.

It is a happy number.

688089031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-688089031 is a prime.

It is a super-2 number, since 2×688089031² = 946933029165037922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688089001) 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, 619905 + ... + 621013.

It is an arithmetic number, because the mean of its divisors is an integer number (49603680).

Almost surely, 2^688089031 is an apocalyptic number.

688089031 is a deficient number, since it is larger than the sum of its proper divisors (105569849).

688089031 is a wasteful number, since it uses less digits than its factorization.

688089031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 688089031 is about 26231.4511798337. The cubic root of 688089031 is about 882.8390706207.

The spelling of 688089031 in words is "six hundred eighty-eight million, eighty-nine thousand, thirty-one".