25403789 has 2 divisors, whose sum is σ = 25403790. Its totient is φ = 25403788.

The previous prime is 25403783. The next prime is 25403803. The reversal of 25403789 is 98730452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23687689 + 1716100 = 4867^2 + 1310^2 .

It is a cyclic number.

It is not a de Polignac number, because 25403789 - 2⁸ = 25403533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25403783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12701894 + 12701895.

It is an arithmetic number, because the mean of its divisors is an integer number (12701895).

Almost surely, 2^25403789 is an apocalyptic number.

It is an amenable number.

25403789 is a deficient number, since it is larger than the sum of its proper divisors (1).

25403789 is an equidigital number, since it uses as much as digits as its factorization.

25403789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 25403789 is about 5040.2171580201. The cubic root of 25403789 is about 293.9676218065.

The spelling of 25403789 in words is "twenty-five million, four hundred three thousand, seven hundred eighty-nine".