689018 has 8 divisors (see below), whose sum is σ = 1127520. Its totient is φ = 313180.

The previous prime is 688999. The next prime is 689021. The reversal of 689018 is 810986.

689018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

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, 15638 + ... + 15681.

It is an arithmetic number, because the mean of its divisors is an integer number (140940).

2⁶⁸⁹⁰¹⁸ is an apocalyptic number.

689018 is a deficient number, since it is larger than the sum of its proper divisors (438502).

689018 is a wasteful number, since it uses less digits than its factorization.

689018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31332.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 689018 is about 830.0710812936. The cubic root of 689018 is about 88.3236190417.

The spelling of 689018 in words is "six hundred eighty-nine thousand, eighteen".