689055 has 16 divisors (see below), whose sum is σ = 1119744. Its totient is φ = 361760.

The previous prime is 689041. The next prime is 689063. The reversal of 689055 is 550986.

It is not a de Polignac number, because 689055 - 2⁸ = 688799 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

689055 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 742 + ... + 1388.

It is an arithmetic number, because the mean of its divisors is an integer number (69984).

2⁶⁸⁹⁰⁵⁵ is an apocalyptic number.

689055 is a deficient number, since it is larger than the sum of its proper divisors (430689).

689055 is a wasteful number, since it uses less digits than its factorization.

689055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 689055 is about 830.0933682424. The cubic root of 689055 is about 88.3251999948.

The spelling of 689055 in words is "six hundred eighty-nine thousand, fifty-five".