25795609 has 6 divisors (see below), whose sum is σ = 30007194. Its totient is φ = 22110480.

The previous prime is 25795607. The next prime is 25795639. The reversal of 25795609 is 90659752.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 23736384 + 2059225 = 4872^2 + 1435^2 .

It is not a de Polignac number, because 25795609 - 2¹ = 25795607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25795607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 263172 + ... + 263269.

It is an arithmetic number, because the mean of its divisors is an integer number (5001199).

Almost surely, 2^25795609 is an apocalyptic number.

It is an amenable number.

25795609 is a deficient number, since it is larger than the sum of its proper divisors (4211585).

25795609 is an equidigital number, since it uses as much as digits as its factorization.

25795609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526455 (or 526448 counting only the distinct ones).

The product of its (nonzero) digits is 170100, while the sum is 43.

The square root of 25795609 is about 5078.9377826471. The cubic root of 25795609 is about 295.4712720070.

The spelling of 25795609 in words is "twenty-five million, seven hundred ninety-five thousand, six hundred nine".