25397629 has 2 divisors, whose sum is σ = 25397630. Its totient is φ = 25397628.

The previous prime is 25397599. The next prime is 25397639. The reversal of 25397629 is 92679352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16216729 + 9180900 = 4027^2 + 3030^2 .

It is a cyclic number.

It is not a de Polignac number, because 25397629 - 2¹⁹ = 24873341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25397639) 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, 12698814 + 12698815.

It is an arithmetic number, because the mean of its divisors is an integer number (12698815).

Almost surely, 2^25397629 is an apocalyptic number.

It is an amenable number.

25397629 is a deficient number, since it is larger than the sum of its proper divisors (1).

25397629 is an equidigital number, since it uses as much as digits as its factorization.

25397629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 43.

The square root of 25397629 is about 5039.6060361897. The cubic root of 25397629 is about 293.9438591185.

The spelling of 25397629 in words is "twenty-five million, three hundred ninety-seven thousand, six hundred twenty-nine".