805679 has 8 divisors (see below), whose sum is σ = 927360. Its totient is φ = 685656.

The previous prime is 805639. The next prime is 805687. The reversal of 805679 is 976508.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 805679 - 2¹⁶ = 740143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805639) 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 7 ways as a sum of consecutive naturals, for example, 932 + ... + 1574.

It is an arithmetic number, because the mean of its divisors is an integer number (115920).

2⁸⁰⁵⁶⁷⁹ is an apocalyptic number.

805679 is a deficient number, since it is larger than the sum of its proper divisors (121681).

805679 is a wasteful number, since it uses less digits than its factorization.

805679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 805679 is about 897.5962343950. The cubic root of 805679 is about 93.0509221260.

The spelling of 805679 in words is "eight hundred five thousand, six hundred seventy-nine".