25688933 has 2 divisors, whose sum is σ = 25688934. Its totient is φ = 25688932.

The previous prime is 25688891. The next prime is 25688977. The reversal of 25688933 is 33988652.

It is an a-pointer prime, because the next prime (25688977) can be obtained adding 25688933 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16826404 + 8862529 = 4102^2 + 2977^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25688933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25688633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12844466 + 12844467.

It is an arithmetic number, because the mean of its divisors is an integer number (12844467).

Almost surely, 2^25688933 is an apocalyptic number.

It is an amenable number.

25688933 is a deficient number, since it is larger than the sum of its proper divisors (1).

25688933 is an equidigital number, since it uses as much as digits as its factorization.

25688933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 44.

The square root of 25688933 is about 5068.4251005613. The cubic root of 25688933 is about 295.0634087578.

The spelling of 25688933 in words is "twenty-five million, six hundred eighty-eight thousand, nine hundred thirty-three".