25800839 has 2 divisors, whose sum is σ = 25800840. Its totient is φ = 25800838.

The previous prime is 25800811. The next prime is 25800851. The reversal of 25800839 is 93800852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25800839 - 2⁸ = 25800583 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 25800799 and 25800808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25800889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12900419 + 12900420.

It is an arithmetic number, because the mean of its divisors is an integer number (12900420).

Almost surely, 2^25800839 is an apocalyptic number.

25800839 is a deficient number, since it is larger than the sum of its proper divisors (1).

25800839 is an equidigital number, since it uses as much as digits as its factorization.

25800839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 25800839 is about 5079.4526279905. The cubic root of 25800839 is about 295.4912393630.

The spelling of 25800839 in words is "twenty-five million, eight hundred thousand, eight hundred thirty-nine".