25996889 has 2 divisors, whose sum is σ = 25996890. Its totient is φ = 25996888.

The previous prime is 25996837. The next prime is 25996909. The reversal of 25996889 is 98869952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25836889 + 160000 = 5083^2 + 400^2 .

It is a cyclic number.

It is not a de Polignac number, because 25996889 - 2¹² = 25992793 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25996189) 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, 12998444 + 12998445.

It is an arithmetic number, because the mean of its divisors is an integer number (12998445).

Almost surely, 2^25996889 is an apocalyptic number.

It is an amenable number.

25996889 is a deficient number, since it is larger than the sum of its proper divisors (1).

25996889 is an equidigital number, since it uses as much as digits as its factorization.

25996889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 56.

The square root of 25996889 is about 5098.7144458187. The cubic root of 25996889 is about 296.2377905678.

The spelling of 25996889 in words is "twenty-five million, nine hundred ninety-six thousand, eight hundred eighty-nine".