25785797 has 2 divisors, whose sum is σ = 25785798. Its totient is φ = 25785796.

The previous prime is 25785779. The next prime is 25785811. The reversal of 25785797 is 79758752.

Together with previous prime (25785779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25715041 + 70756 = 5071^2 + 266^2 .

It is a cyclic number.

It is not a de Polignac number, because 25785797 - 2⁶ = 25785733 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 (25785197) 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, 12892898 + 12892899.

It is an arithmetic number, because the mean of its divisors is an integer number (12892899).

Almost surely, 2^25785797 is an apocalyptic number.

It is an amenable number.

25785797 is a deficient number, since it is larger than the sum of its proper divisors (1).

25785797 is an equidigital number, since it uses as much as digits as its factorization.

25785797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1234800, while the sum is 50.

The square root of 25785797 is about 5077.9717407642. The cubic root of 25785797 is about 295.4338039791.

The spelling of 25785797 in words is "twenty-five million, seven hundred eighty-five thousand, seven hundred ninety-seven".