25465889 has 2 divisors, whose sum is σ = 25465890. Its totient is φ = 25465888.

The previous prime is 25465883. The next prime is 25465897. The reversal of 25465889 is 98856452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21022225 + 4443664 = 4585^2 + 2108^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25465889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25465883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12732944 + 12732945.

It is an arithmetic number, because the mean of its divisors is an integer number (12732945).

Almost surely, 2^25465889 is an apocalyptic number.

It is an amenable number.

25465889 is a deficient number, since it is larger than the sum of its proper divisors (1).

25465889 is an equidigital number, since it uses as much as digits as its factorization.

25465889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 691200, while the sum is 47.

The square root of 25465889 is about 5046.3738466348. The cubic root of 25465889 is about 294.2069631934.

The spelling of 25465889 in words is "twenty-five million, four hundred sixty-five thousand, eight hundred eighty-nine".