25782689 has 4 divisors (see below), whose sum is σ = 25798656. Its totient is φ = 25766724.

The previous prime is 25782683. The next prime is 25782703. The reversal of 25782689 is 98628752.

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 25782689 - 2²⁰ = 24734113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25782683) 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 in 3 ways as a sum of consecutive naturals, for example, 5249 + ... + 8894.

It is an arithmetic number, because the mean of its divisors is an integer number (6449664).

Almost surely, 2^25782689 is an apocalyptic number.

It is an amenable number.

25782689 is a deficient number, since it is larger than the sum of its proper divisors (15967).

25782689 is a wasteful number, since it uses less digits than its factorization.

25782689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15966.

The product of its digits is 483840, while the sum is 47.

The square root of 25782689 is about 5077.6657038446. The cubic root of 25782689 is about 295.4219338120.

The spelling of 25782689 in words is "twenty-five million, seven hundred eighty-two thousand, six hundred eighty-nine".