25379609 has 2 divisors, whose sum is σ = 25379610. Its totient is φ = 25379608.

The previous prime is 25379591. The next prime is 25379647. The reversal of 25379609 is 90697352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24970009 + 409600 = 4997^2 + 640^2 .

It is a cyclic number.

It is not a de Polignac number, because 25379609 - 2⁸ = 25379353 is a prime.

It is not a weakly prime, because it can be changed into another prime (25379659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12689804 + 12689805.

It is an arithmetic number, because the mean of its divisors is an integer number (12689805).

Almost surely, 2^25379609 is an apocalyptic number.

It is an amenable number.

25379609 is a deficient number, since it is larger than the sum of its proper divisors (1).

25379609 is an equidigital number, since it uses as much as digits as its factorization.

25379609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 25379609 is about 5037.8178807893. The cubic root of 25379609 is about 293.8743234731.

The spelling of 25379609 in words is "twenty-five million, three hundred seventy-nine thousand, six hundred nine".