25864847 has 2 divisors, whose sum is σ = 25864848. Its totient is φ = 25864846.

The previous prime is 25864841. The next prime is 25864859. The reversal of 25864847 is 74846852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25864847 - 2⁴ = 25864831 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25864798 and 25864807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25864841) 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, 12932423 + 12932424.

It is an arithmetic number, because the mean of its divisors is an integer number (12932424).

Almost surely, 2^25864847 is an apocalyptic number.

25864847 is a deficient number, since it is larger than the sum of its proper divisors (1).

25864847 is an equidigital number, since it uses as much as digits as its factorization.

25864847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 430080, while the sum is 44.

The square root of 25864847 is about 5085.7494039718. The cubic root of 25864847 is about 295.7353940073.

The spelling of 25864847 in words is "twenty-five million, eight hundred sixty-four thousand, eight hundred forty-seven".