25887189 has 4 divisors (see below), whose sum is σ = 34516256. Its totient is φ = 17258124.

The previous prime is 25887157. The next prime is 25887223. The reversal of 25887189 is 98178852.

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 25887189 - 2⁵ = 25887157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25887089) 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, 4314529 + ... + 4314534.

It is an arithmetic number, because the mean of its divisors is an integer number (8629064).

Almost surely, 2^25887189 is an apocalyptic number.

It is an amenable number.

25887189 is a deficient number, since it is larger than the sum of its proper divisors (8629067).

25887189 is an equidigital number, since it uses as much as digits as its factorization.

25887189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8629066.

The product of its digits is 322560, while the sum is 48.

The square root of 25887189 is about 5087.9454596133. The cubic root of 25887189 is about 295.8205213698.

The spelling of 25887189 in words is "twenty-five million, eight hundred eighty-seven thousand, one hundred eighty-nine".