25868289 has 4 divisors (see below), whose sum is σ = 34491056. Its totient is φ = 17245524.

The previous prime is 25868287. The next prime is 25868341. The reversal of 25868289 is 98286852.

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 not a de Polignac number, because 25868289 - 2¹ = 25868287 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25868281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4311379 + ... + 4311384.

It is an arithmetic number, because the mean of its divisors is an integer number (8622764).

Almost surely, 2^25868289 is an apocalyptic number.

It is an amenable number.

25868289 is a deficient number, since it is larger than the sum of its proper divisors (8622767).

25868289 is an equidigital number, since it uses as much as digits as its factorization.

25868289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8622766.

The product of its digits is 552960, while the sum is 48.

The square root of 25868289 is about 5086.0877892541. The cubic root of 25868289 is about 295.7485118898.

The spelling of 25868289 in words is "twenty-five million, eight hundred sixty-eight thousand, two hundred eighty-nine".