26804989 has 2 divisors, whose sum is σ = 26804990. Its totient is φ = 26804988.

The previous prime is 26804977. The next prime is 26805011. The reversal of 26804989 is 98940862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20629764 + 6175225 = 4542^2 + 2485^2 .

It is a cyclic number.

It is not a de Polignac number, because 26804989 - 2⁵ = 26804957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26808989) 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, 13402494 + 13402495.

It is an arithmetic number, because the mean of its divisors is an integer number (13402495).

Almost surely, 2^26804989 is an apocalyptic number.

It is an amenable number.

26804989 is a deficient number, since it is larger than the sum of its proper divisors (1).

26804989 is an equidigital number, since it uses as much as digits as its factorization.

26804989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 26804989 is about 5177.3534745080. The cubic root of 26804989 is about 299.2759911466.

The spelling of 26804989 in words is "twenty-six million, eight hundred four thousand, nine hundred eighty-nine".