25644089 has 2 divisors, whose sum is σ = 25644090. Its totient is φ = 25644088.

The previous prime is 25644079. The next prime is 25644119. The reversal of 25644089 is 98044652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20839225 + 4804864 = 4565^2 + 2192^2 .

It is a cyclic number.

It is not a de Polignac number, because 25644089 - 2⁸ = 25643833 is a prime.

It is not a weakly prime, because it can be changed into another prime (25644029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12822044 + 12822045.

It is an arithmetic number, because the mean of its divisors is an integer number (12822045).

Almost surely, 2^25644089 is an apocalyptic number.

It is an amenable number.

25644089 is a deficient number, since it is larger than the sum of its proper divisors (1).

25644089 is an equidigital number, since it uses as much as digits as its factorization.

25644089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 25644089 is about 5063.9993088467. Note that the first 3 decimals coincide. The cubic root of 25644089 is about 294.8916158386.

The spelling of 25644089 in words is "twenty-five million, six hundred forty-four thousand, eighty-nine".