25554889 has 2 divisors, whose sum is σ = 25554890. Its totient is φ = 25554888.

The previous prime is 25554877. The next prime is 25554899. The reversal of 25554889 is 98845552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18558864 + 6996025 = 4308^2 + 2645^2 .

It is a cyclic number.

It is not a de Polignac number, because 25554889 - 2⁷ = 25554761 is a prime.

It is not a weakly prime, because it can be changed into another prime (25554839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12777444 + 12777445.

It is an arithmetic number, because the mean of its divisors is an integer number (12777445).

Almost surely, 2^25554889 is an apocalyptic number.

It is an amenable number.

25554889 is a deficient number, since it is larger than the sum of its proper divisors (1).

25554889 is an equidigital number, since it uses as much as digits as its factorization.

25554889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576000, while the sum is 46.

The square root of 25554889 is about 5055.1843685468. The cubic root of 25554889 is about 294.5493031642.

The spelling of 25554889 in words is "twenty-five million, five hundred fifty-four thousand, eight hundred eighty-nine".