25827749 has 2 divisors, whose sum is σ = 25827750. Its totient is φ = 25827748.

The previous prime is 25827733. The next prime is 25827751. The reversal of 25827749 is 94772852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22562500 + 3265249 = 4750^2 + 1807^2 .

It is a cyclic number.

It is not a de Polignac number, because 25827749 - 2⁴ = 25827733 is a prime.

Together with 25827751, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25827779) 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, 12913874 + 12913875.

It is an arithmetic number, because the mean of its divisors is an integer number (12913875).

Almost surely, 2^25827749 is an apocalyptic number.

It is an amenable number.

25827749 is a deficient number, since it is larger than the sum of its proper divisors (1).

25827749 is an equidigital number, since it uses as much as digits as its factorization.

25827749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 44.

The square root of 25827749 is about 5082.1008451230. The cubic root of 25827749 is about 295.5939350719.

The spelling of 25827749 in words is "twenty-five million, eight hundred twenty-seven thousand, seven hundred forty-nine".