689655594 has 16 divisors (see below), whose sum is σ = 1386244800. Its totient is φ = 228729600.

The previous prime is 689655563. The next prime is 689655613. The reversal of 689655594 is 495556986.

689655594 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287607 + ... + 289994.

It is an arithmetic number, because the mean of its divisors is an integer number (86640300).

Almost surely, 2^689655594 is an apocalyptic number.

689655594 is an abundant number, since it is smaller than the sum of its proper divisors (696589206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

689655594 is a wasteful number, since it uses less digits than its factorization.

689655594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577805.

The product of its digits is 11664000, while the sum is 57.

The square root of 689655594 is about 26261.2945987055. The cubic root of 689655594 is about 883.5085454107.

The spelling of 689655594 in words is "six hundred eighty-nine million, six hundred fifty-five thousand, five hundred ninety-four".