25669393 has 2 divisors, whose sum is σ = 25669394. Its totient is φ = 25669392.

The previous prime is 25669373. The next prime is 25669421. The reversal of 25669393 is 39396652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25522704 + 146689 = 5052^2 + 383^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25669393 is a prime.

It is not a weakly prime, because it can be changed into another prime (25669373) 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, 12834696 + 12834697.

It is an arithmetic number, because the mean of its divisors is an integer number (12834697).

Almost surely, 2^25669393 is an apocalyptic number.

It is an amenable number.

25669393 is a deficient number, since it is larger than the sum of its proper divisors (1).

25669393 is an equidigital number, since it uses as much as digits as its factorization.

25669393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 43.

The square root of 25669393 is about 5066.4971133911. The cubic root of 25669393 is about 294.9885775526.

It can be divided in two parts, 25669 and 393, that added together give a palindrome (26062).

The spelling of 25669393 in words is "twenty-five million, six hundred sixty-nine thousand, three hundred ninety-three".