688130855 has 8 divisors (see below), whose sum is σ = 830531232. Its totient is φ = 547321888.

The previous prime is 688130851. The next prime is 688130857. The reversal of 688130855 is 558031886.

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 688130855 - 2² = 688130851 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 (688130851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396899 + ... + 398628.

It is an arithmetic number, because the mean of its divisors is an integer number (103816404).

Almost surely, 2^688130855 is an apocalyptic number.

688130855 is a deficient number, since it is larger than the sum of its proper divisors (142400377).

688130855 is a wasteful number, since it uses less digits than its factorization.

688130855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795705.

The product of its (nonzero) digits is 230400, while the sum is 44.

The square root of 688130855 is about 26232.2483786655. The cubic root of 688130855 is about 882.8569574113.

The spelling of 688130855 in words is "six hundred eighty-eight million, one hundred thirty thousand, eight hundred fifty-five".