25808791 has 2 divisors, whose sum is σ = 25808792. Its totient is φ = 25808790.

The previous prime is 25808789. The next prime is 25808801. The reversal of 25808791 is 19780852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25808791 - 2¹ = 25808789 is a prime.

Together with 25808789, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25808701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12904395 + 12904396.

It is an arithmetic number, because the mean of its divisors is an integer number (12904396).

Almost surely, 2^25808791 is an apocalyptic number.

25808791 is the 2716-th centered heptagonal number.

25808791 is a deficient number, since it is larger than the sum of its proper divisors (1).

25808791 is an equidigital number, since it uses as much as digits as its factorization.

25808791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 25808791 is about 5080.2353291949. The cubic root of 25808791 is about 295.5215937373.

The spelling of 25808791 in words is "twenty-five million, eight hundred eight thousand, seven hundred ninety-one".