304123213 has 2 divisors, whose sum is σ = 304123214. Its totient is φ = 304123212.

The previous prime is 304123207. The next prime is 304123223. The reversal of 304123213 is 312321403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 302690404 + 1432809 = 17398^2 + 1197^2 .

It is a cyclic number.

It is not a de Polignac number, because 304123213 - 2¹⁷ = 303992141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304123223) 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, 152061606 + 152061607.

It is an arithmetic number, because the mean of its divisors is an integer number (152061607).

Almost surely, 2^304123213 is an apocalyptic number.

It is an amenable number.

304123213 is a deficient number, since it is larger than the sum of its proper divisors (1).

304123213 is an equidigital number, since it uses as much as digits as its factorization.

304123213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 304123213 is about 17439.1287913129. The cubic root of 304123213 is about 672.4859109922.

Adding to 304123213 its reverse (312321403), we get a palindrome (616444616).

The spelling of 304123213 in words is "three hundred four million, one hundred twenty-three thousand, two hundred thirteen".