806979 has 4 divisors (see below), whose sum is σ = 1075976. Its totient is φ = 537984.

The previous prime is 806977. The next prime is 806999. The reversal of 806979 is 979608.

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

It is not a de Polignac number, because 806979 - 2¹ = 806977 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 806979.

It is not an unprimeable number, because it can be changed into a prime (806977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134494 + ... + 134499.

It is an arithmetic number, because the mean of its divisors is an integer number (268994).

2⁸⁰⁶⁹⁷⁹ is an apocalyptic number.

806979 is a deficient number, since it is larger than the sum of its proper divisors (268997).

806979 is a wasteful number, since it uses less digits than its factorization.

806979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268996.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 806979 is about 898.3200988512. The cubic root of 806979 is about 93.1009425417.

The spelling of 806979 in words is "eight hundred six thousand, nine hundred seventy-nine".