25651889 has 4 divisors (see below), whose sum is σ = 25670256. Its totient is φ = 25633524.

The previous prime is 25651883. The next prime is 25651891. The reversal of 25651889 is 98815652.

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 25651889 - 2²⁴ = 8874673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25651883) 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 in 3 ways as a sum of consecutive naturals, for example, 6899 + ... + 9944.

It is an arithmetic number, because the mean of its divisors is an integer number (6417564).

Almost surely, 2^25651889 is an apocalyptic number.

It is an amenable number.

25651889 is a deficient number, since it is larger than the sum of its proper divisors (18367).

25651889 is a wasteful number, since it uses less digits than its factorization.

25651889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18366.

The product of its digits is 172800, while the sum is 44.

The square root of 25651889 is about 5064.7693925785. The cubic root of 25651889 is about 294.9215112456.

The spelling of 25651889 in words is "twenty-five million, six hundred fifty-one thousand, eight hundred eighty-nine".