25627989 has 4 divisors (see below), whose sum is σ = 34170656. Its totient is φ = 17085324.

The previous prime is 25627963. The next prime is 25627997. The reversal of 25627989 is 98972652.

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 25627989 - 2⁸ = 25627733 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 (25627919) 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, 4271329 + ... + 4271334.

It is an arithmetic number, because the mean of its divisors is an integer number (8542664).

Almost surely, 2^25627989 is an apocalyptic number.

It is an amenable number.

25627989 is a deficient number, since it is larger than the sum of its proper divisors (8542667).

25627989 is an equidigital number, since it uses as much as digits as its factorization.

25627989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8542666.

The product of its digits is 544320, while the sum is 48.

The square root of 25627989 is about 5062.4094065968. The cubic root of 25627989 is about 294.8298894768.

The spelling of 25627989 in words is "twenty-five million, six hundred twenty-seven thousand, nine hundred eighty-nine".