688100972 has 12 divisors (see below), whose sum is σ = 1296805776. Its totient is φ = 317585040.

The previous prime is 688100947. The next prime is 688100989. The reversal of 688100972 is 279001886.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6616304 + ... + 6616407.

It is an arithmetic number, because the mean of its divisors is an integer number (108067148).

Almost surely, 2^688100972 is an apocalyptic number.

It is an amenable number.

688100972 is a deficient number, since it is larger than the sum of its proper divisors (608704804).

688100972 is a wasteful number, since it uses less digits than its factorization.

688100972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13232728 (or 13232726 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 688100972 is about 26231.6787872984. The cubic root of 688100972 is about 882.8441774794.

The spelling of 688100972 in words is "six hundred eighty-eight million, one hundred thousand, nine hundred seventy-two".