25897829 has 2 divisors, whose sum is σ = 25897830. Its totient is φ = 25897828.

The previous prime is 25897813. The next prime is 25897847. The reversal of 25897829 is 92879852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24453025 + 1444804 = 4945^2 + 1202^2 .

It is a cyclic number.

It is not a de Polignac number, because 25897829 - 2⁴ = 25897813 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25897849) 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, 12948914 + 12948915.

It is an arithmetic number, because the mean of its divisors is an integer number (12948915).

Almost surely, 2^25897829 is an apocalyptic number.

It is an amenable number.

25897829 is a deficient number, since it is larger than the sum of its proper divisors (1).

25897829 is an equidigital number, since it uses as much as digits as its factorization.

25897829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 50.

The square root of 25897829 is about 5088.9909608880. The cubic root of 25897829 is about 295.8610446214.

The spelling of 25897829 in words is "twenty-five million, eight hundred ninety-seven thousand, eight hundred twenty-nine".