25681893 has 4 divisors (see below), whose sum is σ = 34242528. Its totient is φ = 17121260.

The previous prime is 25681891. The next prime is 25681913. The reversal of 25681893 is 39818652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25681893 - 2¹ = 25681891 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25681891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4280313 + ... + 4280318.

It is an arithmetic number, because the mean of its divisors is an integer number (8560632).

Almost surely, 2^25681893 is an apocalyptic number.

It is an amenable number.

25681893 is a deficient number, since it is larger than the sum of its proper divisors (8560635).

25681893 is an equidigital number, since it uses as much as digits as its factorization.

25681893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8560634.

The product of its digits is 103680, while the sum is 42.

The square root of 25681893 is about 5067.7305571626. The cubic root of 25681893 is about 295.0364524523.

The spelling of 25681893 in words is "twenty-five million, six hundred eighty-one thousand, eight hundred ninety-three".