2856779 has 2 divisors, whose sum is σ = 2856780. Its totient is φ = 2856778.

The previous prime is 2856773. The next prime is 2856803. The reversal of 2856779 is 9776582.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2856779 is a prime.

It is a super-2 number, since 2×2856779² = 16322372509682, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2856773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1428389 + 1428390.

It is an arithmetic number, because the mean of its divisors is an integer number (1428390).

2^2856779 is an apocalyptic number.

2856779 is a deficient number, since it is larger than the sum of its proper divisors (1).

2856779 is an equidigital number, since it uses as much as digits as its factorization.

2856779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 44.

The square root of 2856779 is about 1690.2008756358. The cubic root of 2856779 is about 141.8923173567.

The spelling of 2856779 in words is "two million, eight hundred fifty-six thousand, seven hundred seventy-nine".