304431073 has 2 divisors, whose sum is σ = 304431074. Its totient is φ = 304431072.

The previous prime is 304431047. The next prime is 304431103. The reversal of 304431073 is 370134403.

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., 162511504 + 141919569 = 12748^2 + 11913^2 .

It is an emirp because it is prime and its reverse (370134403) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-304431073 is a prime.

It is not a weakly prime, because it can be changed into another prime (304431773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152215536 + 152215537.

It is an arithmetic number, because the mean of its divisors is an integer number (152215537).

Almost surely, 2^304431073 is an apocalyptic number.

It is an amenable number.

304431073 is a deficient number, since it is larger than the sum of its proper divisors (1).

304431073 is an equidigital number, since it uses as much as digits as its factorization.

304431073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 25.

The square root of 304431073 is about 17447.9532610562. The cubic root of 304431073 is about 672.7127507341.

Adding to 304431073 its reverse (370134403), we get a palindrome (674565476).

The spelling of 304431073 in words is "three hundred four million, four hundred thirty-one thousand, seventy-three".