25907891 has 2 divisors, whose sum is σ = 25907892. Its totient is φ = 25907890.

The previous prime is 25907837. The next prime is 25907897. The reversal of 25907891 is 19870952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25907891 - 2¹⁸ = 25645747 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25907897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12953945 + 12953946.

It is an arithmetic number, because the mean of its divisors is an integer number (12953946).

Almost surely, 2^25907891 is an apocalyptic number.

25907891 is a deficient number, since it is larger than the sum of its proper divisors (1).

25907891 is an equidigital number, since it uses as much as digits as its factorization.

25907891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 25907891 is about 5089.9794695067. The cubic root of 25907891 is about 295.8993563060.

The spelling of 25907891 in words is "twenty-five million, nine hundred seven thousand, eight hundred ninety-one".