304320013 has 2 divisors, whose sum is σ = 304320014. Its totient is φ = 304320012.

The previous prime is 304320007. The next prime is 304320101. The reversal of 304320013 is 310023403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187744804 + 116575209 = 13702^2 + 10797^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-304320013 is a prime.

It is a super-2 number, since 2×304320013² = 185221340624640338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304320713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152160006 + 152160007.

It is an arithmetic number, because the mean of its divisors is an integer number (152160007).

Almost surely, 2^304320013 is an apocalyptic number.

It is an amenable number.

304320013 is a deficient number, since it is larger than the sum of its proper divisors (1).

304320013 is an equidigital number, since it uses as much as digits as its factorization.

304320013 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 16.

The square root of 304320013 is about 17444.7703624897. The cubic root of 304320013 is about 672.6309363030.

Adding to 304320013 its reverse (310023403), we get a palindrome (614343416).

The spelling of 304320013 in words is "three hundred four million, three hundred twenty thousand, thirteen".