25665793 has 2 divisors, whose sum is σ = 25665794. Its totient is φ = 25665792.

The previous prime is 25665779. The next prime is 25665821. The reversal of 25665793 is 39756652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22543504 + 3122289 = 4748^2 + 1767^2 .

It is a cyclic number.

It is not a de Polignac number, because 25665793 - 2¹⁷ = 25534721 is a prime.

It is not a weakly prime, because it can be changed into another prime (25665743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12832896 + 12832897.

It is an arithmetic number, because the mean of its divisors is an integer number (12832897).

Almost surely, 2^25665793 is an apocalyptic number.

It is an amenable number.

25665793 is a deficient number, since it is larger than the sum of its proper divisors (1).

25665793 is an equidigital number, since it uses as much as digits as its factorization.

25665793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 43.

The square root of 25665793 is about 5066.1418258868. The cubic root of 25665793 is about 294.9747866989.

It can be divided in two parts, 256 and 65793, that added together give a square (66049 = 257²).

The spelling of 25665793 in words is "twenty-five million, six hundred sixty-five thousand, seven hundred ninety-three".