25992749 has 2 divisors, whose sum is σ = 25992750. Its totient is φ = 25992748.

The previous prime is 25992727. The next prime is 25992767. The reversal of 25992749 is 94729952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24255625 + 1737124 = 4925^2 + 1318^2 .

It is a cyclic number.

It is not a de Polignac number, because 25992749 - 2⁸ = 25992493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25992719) 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, 12996374 + 12996375.

It is an arithmetic number, because the mean of its divisors is an integer number (12996375).

Almost surely, 2^25992749 is an apocalyptic number.

It is an amenable number.

25992749 is a deficient number, since it is larger than the sum of its proper divisors (1).

25992749 is an equidigital number, since it uses as much as digits as its factorization.

25992749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 47.

The square root of 25992749 is about 5098.3084449649. The cubic root of 25992749 is about 296.2220644610. Note that the first 3 decimals are identical.

The spelling of 25992749 in words is "twenty-five million, nine hundred ninety-two thousand, seven hundred forty-nine".