605689 has 12 divisors (see below), whose sum is σ = 722304. Its totient is φ = 506184.

The previous prime is 605687. The next prime is 605707. The reversal of 605689 is 986506.

It is not a de Polignac number, because 605689 - 2¹ = 605687 is a prime.

It is a Duffinian number.

605689 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605687) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2172 + ... + 2434.

It is an arithmetic number, because the mean of its divisors is an integer number (60192).

2⁶⁰⁵⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

605689 is a deficient number, since it is larger than the sum of its proper divisors (116615).

605689 is a wasteful number, since it uses less digits than its factorization.

605689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 605689 is about 778.2602392516. The cubic root of 605689 is about 84.6090000057.

The spelling of 605689 in words is "six hundred five thousand, six hundred eighty-nine".