25911489 has 4 divisors (see below), whose sum is σ = 34548656. Its totient is φ = 17274324.

The previous prime is 25911469. The next prime is 25911517. The reversal of 25911489 is 98411952.

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 25911489 - 2⁸ = 25911233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25911469) 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, 4318579 + ... + 4318584.

It is an arithmetic number, because the mean of its divisors is an integer number (8637164).

Almost surely, 2^25911489 is an apocalyptic number.

It is an amenable number.

25911489 is a deficient number, since it is larger than the sum of its proper divisors (8637167).

25911489 is an equidigital number, since it uses as much as digits as its factorization.

25911489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8637166.

The product of its digits is 25920, while the sum is 39.

The square root of 25911489 is about 5090.3328967760. The cubic root of 25911489 is about 295.9130535049.

The spelling of 25911489 in words is "twenty-five million, nine hundred eleven thousand, four hundred eighty-nine".