25695569 has 2 divisors, whose sum is σ = 25695570. Its totient is φ = 25695568.

The previous prime is 25695563. The next prime is 25695587. The reversal of 25695569 is 96559652.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18593344 + 7102225 = 4312^2 + 2665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25695569 is a prime.

It is a super-2 number, since 2×25695569² = 1320524532467522, which contains 22 as substring.

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 (25695563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12847784 + 12847785.

It is an arithmetic number, because the mean of its divisors is an integer number (12847785).

Almost surely, 2^25695569 is an apocalyptic number.

It is an amenable number.

25695569 is a deficient number, since it is larger than the sum of its proper divisors (1).

25695569 is an equidigital number, since it uses as much as digits as its factorization.

25695569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 729000, while the sum is 47.

The square root of 25695569 is about 5069.0796995115. The cubic root of 25695569 is about 295.0888136303.

The spelling of 25695569 in words is "twenty-five million, six hundred ninety-five thousand, five hundred sixty-nine".