25963549 has 2 divisors, whose sum is σ = 25963550. Its totient is φ = 25963548.

The previous prime is 25963507. The next prime is 25963559. The reversal of 25963549 is 94536952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25180324 + 783225 = 5018^2 + 885^2 .

It is a cyclic number.

It is not a de Polignac number, because 25963549 - 2¹⁵ = 25930781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25963559) 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 as a sum of consecutive naturals, namely, 12981774 + 12981775.

It is an arithmetic number, because the mean of its divisors is an integer number (12981775).

Almost surely, 2^25963549 is an apocalyptic number.

It is an amenable number.

25963549 is a deficient number, since it is larger than the sum of its proper divisors (1).

25963549 is an equidigital number, since it uses as much as digits as its factorization.

25963549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 291600, while the sum is 43.

The square root of 25963549 is about 5095.4439453300. The cubic root of 25963549 is about 296.1110985746. Note that the first 3 decimals are identical.

The spelling of 25963549 in words is "twenty-five million, nine hundred sixty-three thousand, five hundred forty-nine".