25945687 has 2 divisors, whose sum is σ = 25945688. Its totient is φ = 25945686.

The previous prime is 25945651. The next prime is 25945709. The reversal of 25945687 is 78654952.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25945687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25945607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12972843 + 12972844.

It is an arithmetic number, because the mean of its divisors is an integer number (12972844).

Almost surely, 2^25945687 is an apocalyptic number.

25945687 is a deficient number, since it is larger than the sum of its proper divisors (1).

25945687 is an equidigital number, since it uses as much as digits as its factorization.

25945687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 46.

The square root of 25945687 is about 5093.6909014977. The cubic root of 25945687 is about 296.0431783554.

It can be divided in two parts, 2594 and 5687, that added together give a square (8281 = 91²).

The spelling of 25945687 in words is "twenty-five million, nine hundred forty-five thousand, six hundred eighty-seven".