25317889 has 2 divisors, whose sum is σ = 25317890. Its totient is φ = 25317888.

The previous prime is 25317883. The next prime is 25317923. The reversal of 25317889 is 98871352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23357889 + 1960000 = 4833^2 + 1400^2 .

It is a cyclic number.

It is not a de Polignac number, because 25317889 - 2⁵ = 25317857 is a prime.

It is not a weakly prime, because it can be changed into another prime (25317883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12658944 + 12658945.

It is an arithmetic number, because the mean of its divisors is an integer number (12658945).

Almost surely, 2^25317889 is an apocalyptic number.

It is an amenable number.

25317889 is a deficient number, since it is larger than the sum of its proper divisors (1).

25317889 is an equidigital number, since it uses as much as digits as its factorization.

25317889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 43.

The square root of 25317889 is about 5031.6884839982. The cubic root of 25317889 is about 293.6359083713.

The spelling of 25317889 in words is "twenty-five million, three hundred seventeen thousand, eight hundred eighty-nine".