25808891 has 2 divisors, whose sum is σ = 25808892. Its totient is φ = 25808890.

The previous prime is 25808879. The next prime is 25808903. The reversal of 25808891 is 19880852.

It is a balanced prime because it is at equal distance from previous prime (25808879) and next prime (25808903).

It is a cyclic number.

It is not a de Polignac number, because 25808891 - 2¹⁰ = 25807867 is a prime.

It is not a weakly prime, because it can be changed into another prime (25808801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12904445 + 12904446.

It is an arithmetic number, because the mean of its divisors is an integer number (12904446).

Almost surely, 2^25808891 is an apocalyptic number.

25808891 is a deficient number, since it is larger than the sum of its proper divisors (1).

25808891 is an equidigital number, since it uses as much as digits as its factorization.

25808891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 41.

The square root of 25808891 is about 5080.2451712491. The cubic root of 25808891 is about 295.5219754176.

The spelling of 25808891 in words is "twenty-five million, eight hundred eight thousand, eight hundred ninety-one".