679589 has 4 divisors (see below), whose sum is σ = 684300. Its totient is φ = 674880.

The previous prime is 679561. The next prime is 679597. The reversal of 679589 is 985976.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 146689 + 532900 = 383^2 + 730^2 .

It is a cyclic number.

It is not a de Polignac number, because 679589 - 2⁸ = 679333 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679519) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2132 + ... + 2429.

It is an arithmetic number, because the mean of its divisors is an integer number (171075).

2⁶⁷⁹⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

679589 is a deficient number, since it is larger than the sum of its proper divisors (4711).

679589 is a wasteful number, since it uses less digits than its factorization.

679589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4710.

The product of its digits is 136080, while the sum is 44.

The square root of 679589 is about 824.3718821018. The cubic root of 679589 is about 87.9188732354.

The spelling of 679589 in words is "six hundred seventy-nine thousand, five hundred eighty-nine".