25664959 has 2 divisors, whose sum is σ = 25664960. Its totient is φ = 25664958.

The previous prime is 25664929. The next prime is 25664983. The reversal of 25664959 is 95946652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25664959 - 2⁵ = 25664927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25664929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12832479 + 12832480.

It is an arithmetic number, because the mean of its divisors is an integer number (12832480).

Almost surely, 2^25664959 is an apocalyptic number.

25664959 is a deficient number, since it is larger than the sum of its proper divisors (1).

25664959 is an equidigital number, since it uses as much as digits as its factorization.

25664959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 46.

The square root of 25664959 is about 5066.0595140602. The cubic root of 25664959 is about 294.9715916338.

The spelling of 25664959 in words is "twenty-five million, six hundred sixty-four thousand, nine hundred fifty-nine".