26779859 has 2 divisors, whose sum is σ = 26779860. Its totient is φ = 26779858.

The previous prime is 26779849. The next prime is 26779861. The reversal of 26779859 is 95897762.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26779859 is a prime.

It is a Sophie Germain prime.

Together with 26779861, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26779859.

It is not a weakly prime, because it can be changed into another prime (26779829) 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 as a sum of consecutive naturals, namely, 13389929 + 13389930.

It is an arithmetic number, because the mean of its divisors is an integer number (13389930).

Almost surely, 2^26779859 is an apocalyptic number.

26779859 is a deficient number, since it is larger than the sum of its proper divisors (1).

26779859 is an equidigital number, since it uses as much as digits as its factorization.

26779859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 53.

The square root of 26779859 is about 5174.9259898089. The cubic root of 26779859 is about 299.1824369558.

The spelling of 26779859 in words is "twenty-six million, seven hundred seventy-nine thousand, eight hundred fifty-nine".