689937018 has 8 divisors (see below), whose sum is σ = 1379874048. Its totient is φ = 229979004.

The previous prime is 689937011. The next prime is 689937019. The reversal of 689937018 is 810739986.

It is a sphenic number, since it is the product of 3 distinct primes.

689937018 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (689937011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57494746 + ... + 57494757.

It is an arithmetic number, because the mean of its divisors is an integer number (172484256).

Almost surely, 2^689937018 is an apocalyptic number.

689937018 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

689937018 is a wasteful number, since it uses less digits than its factorization.

689937018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114989508.

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 689937018 is about 26266.6522038877. The cubic root of 689937018 is about 883.6287052404.

The spelling of 689937018 in words is "six hundred eighty-nine million, nine hundred thirty-seven thousand, eighteen".