679559 has 4 divisors (see below), whose sum is σ = 681504. Its totient is φ = 677616.

The previous prime is 679537. The next prime is 679561. The reversal of 679559 is 955976.

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

It is a cyclic number.

It is not a de Polignac number, because 679559 - 2¹² = 675463 is a prime.

It is a Duffinian 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, 287 + ... + 1200.

It is an arithmetic number, because the mean of its divisors is an integer number (170376).

2⁶⁷⁹⁵⁵⁹ is an apocalyptic number.

679559 is a deficient number, since it is larger than the sum of its proper divisors (1945).

679559 is a wasteful number, since it uses less digits than its factorization.

679559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944.

The product of its digits is 85050, while the sum is 41.

The square root of 679559 is about 824.3536862294. The cubic root of 679559 is about 87.9175795098.

The spelling of 679559 in words is "six hundred seventy-nine thousand, five hundred fifty-nine".