25847489 has 2 divisors, whose sum is σ = 25847490. Its totient is φ = 25847488.

The previous prime is 25847473. The next prime is 25847527. The reversal of 25847489 is 98474852.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14691889 + 11155600 = 3833^2 + 3340^2 .

It is a cyclic number.

It is not a de Polignac number, because 25847489 - 2⁴ = 25847473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25846489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12923744 + 12923745.

It is an arithmetic number, because the mean of its divisors is an integer number (12923745).

Almost surely, 2^25847489 is an apocalyptic number.

It is an amenable number.

25847489 is a deficient number, since it is larger than the sum of its proper divisors (1).

25847489 is an equidigital number, since it uses as much as digits as its factorization.

25847489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 47.

The square root of 25847489 is about 5084.0425844007. The cubic root of 25847489 is about 295.6692228092.

The spelling of 25847489 in words is "twenty-five million, eight hundred forty-seven thousand, four hundred eighty-nine".