25730687 has 2 divisors, whose sum is σ = 25730688. Its totient is φ = 25730686.

The previous prime is 25730681. The next prime is 25730699. The reversal of 25730687 is 78603752.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25730687 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25730687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25730681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12865343 + 12865344.

It is an arithmetic number, because the mean of its divisors is an integer number (12865344).

Almost surely, 2^25730687 is an apocalyptic number.

25730687 is a deficient number, since it is larger than the sum of its proper divisors (1).

25730687 is an equidigital number, since it uses as much as digits as its factorization.

25730687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 25730687 is about 5072.5424591619. The cubic root of 25730687 is about 295.2231845479.

The spelling of 25730687 in words is "twenty-five million, seven hundred thirty thousand, six hundred eighty-seven".