689312618 has 32 divisors (see below), whose sum is σ = 1076556096. Its totient is φ = 330801408.

The previous prime is 689312587. The next prime is 689312633. The reversal of 689312618 is 816213986.

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 15 ways as a sum of consecutive naturals, for example, 1591730 + ... + 1592162.

It is an arithmetic number, because the mean of its divisors is an integer number (33642378).

Almost surely, 2^689312618 is an apocalyptic number.

689312618 is a deficient number, since it is larger than the sum of its proper divisors (387243478).

689312618 is a wasteful number, since it uses less digits than its factorization.

689312618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758.

The product of its digits is 124416, while the sum is 44.

The square root of 689312618 is about 26254.7637201328. The cubic root of 689312618 is about 883.3620604715.

The spelling of 689312618 in words is "six hundred eighty-nine million, three hundred twelve thousand, six hundred eighteen".