25680791 has 2 divisors, whose sum is σ = 25680792. Its totient is φ = 25680790.

The previous prime is 25680763. The next prime is 25680821. The reversal of 25680791 is 19708652.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25680791 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 (25680731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12840395 + 12840396.

It is an arithmetic number, because the mean of its divisors is an integer number (12840396).

Almost surely, 2^25680791 is an apocalyptic number.

25680791 is a deficient number, since it is larger than the sum of its proper divisors (1).

25680791 is an equidigital number, since it uses as much as digits as its factorization.

25680791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 25680791 is about 5067.6218288266. The cubic root of 25680791 is about 295.0322324256.

The spelling of 25680791 in words is "twenty-five million, six hundred eighty thousand, seven hundred ninety-one".