25304989 has 2 divisors, whose sum is σ = 25304990. Its totient is φ = 25304988.

The previous prime is 25304987. The next prime is 25304999. The reversal of 25304989 is 98940352.

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., 15539364 + 9765625 = 3942^2 + 3125^2 .

It is a cyclic number.

It is not a de Polignac number, because 25304989 - 2¹ = 25304987 is a prime.

Together with 25304987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25304987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12652494 + 12652495.

It is an arithmetic number, because the mean of its divisors is an integer number (12652495).

Almost surely, 2^25304989 is an apocalyptic number.

It is an amenable number.

25304989 is a deficient number, since it is larger than the sum of its proper divisors (1).

25304989 is an equidigital number, since it uses as much as digits as its factorization.

25304989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 25304989 is about 5030.4064448114. The cubic root of 25304989 is about 293.5860286632.

The spelling of 25304989 in words is "twenty-five million, three hundred four thousand, nine hundred eighty-nine".