25940839 has 2 divisors, whose sum is σ = 25940840. Its totient is φ = 25940838.

The previous prime is 25940791. The next prime is 25940843. The reversal of 25940839 is 93804952.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25940839 - 2¹¹ = 25938791 is a 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 (25940869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12970419 + 12970420.

It is an arithmetic number, because the mean of its divisors is an integer number (12970420).

Almost surely, 2^25940839 is an apocalyptic number.

25940839 is a deficient number, since it is larger than the sum of its proper divisors (1).

25940839 is an equidigital number, since it uses as much as digits as its factorization.

25940839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 25940839 is about 5093.2149964438. The cubic root of 25940839 is about 296.0247384669.

The spelling of 25940839 in words is "twenty-five million, nine hundred forty thousand, eight hundred thirty-nine".