25397513 has 2 divisors, whose sum is σ = 25397514. Its totient is φ = 25397512.

The previous prime is 25397483. The next prime is 25397521. The reversal of 25397513 is 31579352.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17405584 + 7991929 = 4172^2 + 2827^2 .

It is a cyclic number.

It is not a de Polignac number, because 25397513 - 2⁸ = 25397257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25396513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12698756 + 12698757.

It is an arithmetic number, because the mean of its divisors is an integer number (12698757).

Almost surely, 2^25397513 is an apocalyptic number.

It is an amenable number.

25397513 is a deficient number, since it is larger than the sum of its proper divisors (1).

25397513 is an equidigital number, since it uses as much as digits as its factorization.

25397513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28350, while the sum is 35.

The square root of 25397513 is about 5039.5945273405. The cubic root of 25397513 is about 293.9434116024.

The spelling of 25397513 in words is "twenty-five million, three hundred ninety-seven thousand, five hundred thirteen".