688230631 has 8 divisors (see below), whose sum is σ = 754107264. Its totient is φ = 622905720.

The previous prime is 688230629. The next prime is 688230637. The reversal of 688230631 is 136032886.

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 688230631 - 2¹ = 688230629 is a prime.

It is a super-2 number, since 2×688230631² = 947322802893316322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688230637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135315 + ... + 140308.

It is an arithmetic number, because the mean of its divisors is an integer number (94263408).

Almost surely, 2^688230631 is an apocalyptic number.

688230631 is a deficient number, since it is larger than the sum of its proper divisors (65876633).

688230631 is a wasteful number, since it uses less digits than its factorization.

688230631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275861.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 688230631 is about 26234.1500910550. The cubic root of 688230631 is about 882.8996254969.

The spelling of 688230631 in words is "six hundred eighty-eight million, two hundred thirty thousand, six hundred thirty-one".