25286609 has 2 divisors, whose sum is σ = 25286610. Its totient is φ = 25286608.

The previous prime is 25286593. The next prime is 25286617. The reversal of 25286609 is 90668252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22118209 + 3168400 = 4703^2 + 1780^2 .

It is a cyclic number.

It is not a de Polignac number, because 25286609 - 2⁴ = 25286593 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 (25286699) 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, 12643304 + 12643305.

It is an arithmetic number, because the mean of its divisors is an integer number (12643305).

Almost surely, 2^25286609 is an apocalyptic number.

It is an amenable number.

25286609 is a deficient number, since it is larger than the sum of its proper divisors (1).

25286609 is an equidigital number, since it uses as much as digits as its factorization.

25286609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 25286609 is about 5028.5792228024. The cubic root of 25286609 is about 293.5149304541.

The spelling of 25286609 in words is "twenty-five million, two hundred eighty-six thousand, six hundred nine".