304242493 has 2 divisors, whose sum is σ = 304242494. Its totient is φ = 304242492.

The previous prime is 304242487. The next prime is 304242539. The reversal of 304242493 is 394242403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255424324 + 48818169 = 15982^2 + 6987^2 .

It is an emirp because it is prime and its reverse (394242403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 304242493 - 2⁵ = 304242461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304242403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152121246 + 152121247.

It is an arithmetic number, because the mean of its divisors is an integer number (152121247).

Almost surely, 2^304242493 is an apocalyptic number.

It is an amenable number.

304242493 is a deficient number, since it is larger than the sum of its proper divisors (1).

304242493 is an equidigital number, since it uses as much as digits as its factorization.

304242493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 304242493 is about 17442.5483516601. The cubic root of 304242493 is about 672.5738179451.

Adding to 304242493 its reverse (394242403), we get a palindrome (698484896).

The spelling of 304242493 in words is "three hundred four million, two hundred forty-two thousand, four hundred ninety-three".