689806 has 16 divisors (see below), whose sum is σ = 1142064. Its totient is φ = 310464.

The previous prime is 689803. The next prime is 689807. The reversal of 689806 is 608986.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 810 + ... + 1426.

It is an arithmetic number, because the mean of its divisors is an integer number (71379).

2⁶⁸⁹⁸⁰⁶ is an apocalyptic number.

689806 is a deficient number, since it is larger than the sum of its proper divisors (452258).

689806 is a wasteful number, since it uses less digits than its factorization.

689806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 689806 is about 830.5456038051. The cubic root of 689806 is about 88.3572768446.

It can be divided in two parts, 68980 and 6, that added together give a palindrome (68986).

The spelling of 689806 in words is "six hundred eighty-nine thousand, eight hundred six".