25684039 has 2 divisors, whose sum is σ = 25684040. Its totient is φ = 25684038.

The previous prime is 25684019. The next prime is 25684049. The reversal of 25684039 is 93048652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25684039 - 2¹¹ = 25681991 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25683989 and 25684007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25684019) 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, 12842019 + 12842020.

It is an arithmetic number, because the mean of its divisors is an integer number (12842020).

Almost surely, 2^25684039 is an apocalyptic number.

25684039 is a deficient number, since it is larger than the sum of its proper divisors (1).

25684039 is an equidigital number, since it uses as much as digits as its factorization.

25684039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 25684039 is about 5067.9422845964. The cubic root of 25684039 is about 295.0446700526.

The spelling of 25684039 in words is "twenty-five million, six hundred eighty-four thousand, thirty-nine".