805979 has 4 divisors (see below), whose sum is σ = 807984. Its totient is φ = 803976.

The previous prime is 805967. The next prime is 805991. The reversal of 805979 is 979508.

805979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (805967) and next prime (805991).

It is a cyclic number.

It is not a de Polignac number, because 805979 - 2⁸ = 805723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (805279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167 + ... + 1280.

It is an arithmetic number, because the mean of its divisors is an integer number (201996).

2⁸⁰⁵⁹⁷⁹ is an apocalyptic number.

805979 is a deficient number, since it is larger than the sum of its proper divisors (2005).

805979 is a wasteful number, since it uses less digits than its factorization.

805979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 805979 is about 897.7633318420. The cubic root of 805979 is about 93.0624700719.

The spelling of 805979 in words is "eight hundred five thousand, nine hundred seventy-nine".