689479388 has 12 divisors (see below), whose sum is σ = 1299403560. Its totient is φ = 318221232.

The previous prime is 689479283. The next prime is 689479433. The reversal of 689479388 is 883974986.

It is a happy number.

689479388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 689479388.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6629558 + ... + 6629661.

It is an arithmetic number, because the mean of its divisors is an integer number (108283630).

Almost surely, 2^689479388 is an apocalyptic number.

It is an amenable number.

689479388 is a deficient number, since it is larger than the sum of its proper divisors (609924172).

689479388 is a wasteful number, since it uses less digits than its factorization.

689479388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13259236 (or 13259234 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 62.

The square root of 689479388 is about 26257.9395231233. The cubic root of 689479388 is about 883.4332939526.

The spelling of 689479388 in words is "six hundred eighty-nine million, four hundred seventy-nine thousand, three hundred eighty-eight".