2806979 has 4 divisors (see below), whose sum is σ = 3207984. Its totient is φ = 2405976.

The previous prime is 2806963. The next prime is 2806987. The reversal of 2806979 is 9796082.

2806979 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 a cyclic number.

It is not a de Polignac number, because 2806979 - 2⁴ = 2806963 is a prime.

It is a super-2 number, since 2×2806979² = 15758262212882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2806919) 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, 200492 + ... + 200505.

It is an arithmetic number, because the mean of its divisors is an integer number (801996).

2^2806979 is an apocalyptic number.

2806979 is a deficient number, since it is larger than the sum of its proper divisors (401005).

2806979 is an equidigital number, since it uses as much as digits as its factorization.

2806979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401004.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 2806979 is about 1675.4041303518. The cubic root of 2806979 is about 141.0629800970.

The spelling of 2806979 in words is "two million, eight hundred six thousand, nine hundred seventy-nine".