25855799 has 2 divisors, whose sum is σ = 25855800. Its totient is φ = 25855798.

The previous prime is 25855787. The next prime is 25855867. The reversal of 25855799 is 99755852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25855799 - 2¹² = 25851703 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25855699) 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, 12927899 + 12927900.

It is an arithmetic number, because the mean of its divisors is an integer number (12927900).

Almost surely, 2^25855799 is an apocalyptic number.

25855799 is a deficient number, since it is larger than the sum of its proper divisors (1).

25855799 is an equidigital number, since it uses as much as digits as its factorization.

25855799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134000, while the sum is 50.

The square root of 25855799 is about 5084.8597817442. The cubic root of 25855799 is about 295.7009054223.

The spelling of 25855799 in words is "twenty-five million, eight hundred fifty-five thousand, seven hundred ninety-nine".