689618 has 8 divisors (see below), whose sum is σ = 1038000. Its totient is φ = 343620.

The previous prime is 689603. The next prime is 689621. The reversal of 689618 is 816986.

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

It is a Curzon 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, 653 + ... + 1343.

It is an arithmetic number, because the mean of its divisors is an integer number (129750).

2⁶⁸⁹⁶¹⁸ is an apocalyptic number.

689618 is a deficient number, since it is larger than the sum of its proper divisors (348382).

689618 is a wasteful number, since it uses less digits than its factorization.

689618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192.

The product of its digits is 20736, while the sum is 38.

The square root of 689618 is about 830.4324174790. The cubic root of 689618 is about 88.3492491396.

The spelling of 689618 in words is "six hundred eighty-nine thousand, six hundred eighteen".