25328749 has 2 divisors, whose sum is σ = 25328750. Its totient is φ = 25328748.

The previous prime is 25328717. The next prime is 25328789. The reversal of 25328749 is 94782352.

It is an a-pointer prime, because the next prime (25328789) can be obtained adding 25328749 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24571849 + 756900 = 4957^2 + 870^2 .

It is a cyclic number.

It is not a de Polignac number, because 25328749 - 2⁵ = 25328717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25328789) 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, 12664374 + 12664375.

It is an arithmetic number, because the mean of its divisors is an integer number (12664375).

Almost surely, 2^25328749 is an apocalyptic number.

It is an amenable number.

25328749 is a deficient number, since it is larger than the sum of its proper divisors (1).

25328749 is an equidigital number, since it uses as much as digits as its factorization.

25328749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

The square root of 25328749 is about 5032.7675289049. The cubic root of 25328749 is about 293.6778869913.

The spelling of 25328749 in words is "twenty-five million, three hundred twenty-eight thousand, seven hundred forty-nine".