688279387 has 8 divisors (see below), whose sum is σ = 694167552. Its totient is φ = 682415400.

The previous prime is 688279379. The next prime is 688279447. The reversal of 688279387 is 783972886.

688279387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 688279387 - 2³ = 688279379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688279337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53608 + ... + 65194.

It is an arithmetic number, because the mean of its divisors is an integer number (86770944).

Almost surely, 2^688279387 is an apocalyptic number.

688279387 is a deficient number, since it is larger than the sum of its proper divisors (5888165).

688279387 is a wasteful number, since it uses less digits than its factorization.

688279387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12089.

The product of its digits is 8128512, while the sum is 58.

The square root of 688279387 is about 26235.0793213971. The cubic root of 688279387 is about 882.9204739527.

The spelling of 688279387 in words is "six hundred eighty-eight million, two hundred seventy-nine thousand, three hundred eighty-seven".