25947569 has 2 divisors, whose sum is σ = 25947570. Its totient is φ = 25947568.

The previous prime is 25947557. The next prime is 25947577. The reversal of 25947569 is 96574952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25633969 + 313600 = 5063^2 + 560^2 .

It is a cyclic number.

It is not a de Polignac number, because 25947569 - 2¹² = 25943473 is a prime.

It is a super-2 number, since 2×25947569² = 1346552674019522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25947539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12973784 + 12973785.

It is an arithmetic number, because the mean of its divisors is an integer number (12973785).

Almost surely, 2^25947569 is an apocalyptic number.

It is an amenable number.

25947569 is a deficient number, since it is larger than the sum of its proper divisors (1).

25947569 is an equidigital number, since it uses as much as digits as its factorization.

25947569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 47.

The square root of 25947569 is about 5093.8756364874. The cubic root of 25947569 is about 296.0503361255.

The spelling of 25947569 in words is "twenty-five million, nine hundred forty-seven thousand, five hundred sixty-nine".