2779859 has 2 divisors, whose sum is σ = 2779860. Its totient is φ = 2779858.

The previous prime is 2779811. The next prime is 2779873. The reversal of 2779859 is 9589772.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2779859 - 2⁸ = 2779603 is a prime.

It is not a weakly prime, because it can be changed into another prime (2775859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1389929 + 1389930.

It is an arithmetic number, because the mean of its divisors is an integer number (1389930).

2^2779859 is an apocalyptic number.

2779859 is a deficient number, since it is larger than the sum of its proper divisors (1).

2779859 is an equidigital number, since it uses as much as digits as its factorization.

2779859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 47.

The square root of 2779859 is about 1667.2909164270. The cubic root of 2779859 is about 140.6072095354.

The spelling of 2779859 in words is "two million, seven hundred seventy-nine thousand, eight hundred fifty-nine".