304021313 has 2 divisors, whose sum is σ = 304021314. Its totient is φ = 304021312.

The previous prime is 304021307. The next prime is 304021321. The reversal of 304021313 is 313120403.

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., 303874624 + 146689 = 17432^2 + 383^2 .

It is a cyclic number.

It is not a de Polignac number, because 304021313 - 2⁸ = 304021057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 304021291 and 304021300.

It is not a weakly prime, because it can be changed into another prime (304021213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152010656 + 152010657.

It is an arithmetic number, because the mean of its divisors is an integer number (152010657).

Almost surely, 2^304021313 is an apocalyptic number.

It is an amenable number.

304021313 is a deficient number, since it is larger than the sum of its proper divisors (1).

304021313 is an equidigital number, since it uses as much as digits as its factorization.

304021313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 304021313 is about 17436.2069556426. The cubic root of 304021313 is about 672.4107945412.

Adding to 304021313 its reverse (313120403), we get a palindrome (617141716).

The spelling of 304021313 in words is "three hundred four million, twenty-one thousand, three hundred thirteen".