688794997 has 16 divisors (see below), whose sum is σ = 772920000. Its totient is φ = 608307840.

The previous prime is 688794989. The next prime is 688795013. The reversal of 688794997 is 799497886.

688794997 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 not a de Polignac number, because 688794997 - 2³ = 688794989 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 (688794397) 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, 458754 + ... + 460252.

It is an arithmetic number, because the mean of its divisors is an integer number (48307500).

Almost surely, 2^688794997 is an apocalyptic number.

It is an amenable number.

688794997 is a deficient number, since it is larger than the sum of its proper divisors (84125003).

688794997 is a wasteful number, since it uses less digits than its factorization.

688794997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2676.

The product of its digits is 54867456, while the sum is 67.

The square root of 688794997 is about 26244.9042101510. The cubic root of 688794997 is about 883.1408926775.

The spelling of 688794997 in words is "six hundred eighty-eight million, seven hundred ninety-four thousand, nine hundred ninety-seven".