25366009 has 2 divisors, whose sum is σ = 25366010. Its totient is φ = 25366008.

The previous prime is 25365997. The next prime is 25366013. The reversal of 25366009 is 90066352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17682025 + 7683984 = 4205^2 + 2772^2 .

It is a cyclic number.

It is not a de Polignac number, because 25366009 - 2⁷ = 25365881 is a prime.

It is not a weakly prime, because it can be changed into another prime (25366109) 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, 12683004 + 12683005.

It is an arithmetic number, because the mean of its divisors is an integer number (12683005).

Almost surely, 2^25366009 is an apocalyptic number.

It is an amenable number.

25366009 is a deficient number, since it is larger than the sum of its proper divisors (1).

25366009 is an equidigital number, since it uses as much as digits as its factorization.

25366009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 25366009 is about 5036.4679091601. The cubic root of 25366009 is about 293.8218219431.

The spelling of 25366009 in words is "twenty-five million, three hundred sixty-six thousand, nine".