25798391 has 2 divisors, whose sum is σ = 25798392. Its totient is φ = 25798390.

The previous prime is 25798379. The next prime is 25798393. The reversal of 25798391 is 19389752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25798391 - 2¹⁰ = 25797367 is a prime.

Together with 25798393, 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 (25798393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12899195 + 12899196.

It is an arithmetic number, because the mean of its divisors is an integer number (12899196).

Almost surely, 2^25798391 is an apocalyptic number.

25798391 is a deficient number, since it is larger than the sum of its proper divisors (1).

25798391 is an equidigital number, since it uses as much as digits as its factorization.

25798391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 44.

The square root of 25798391 is about 5079.2116514278. The cubic root of 25798391 is about 295.4818936019.

The spelling of 25798391 in words is "twenty-five million, seven hundred ninety-eight thousand, three hundred ninety-one".