320730713 has 2 divisors, whose sum is σ = 320730714. Its totient is φ = 320730712.

The previous prime is 320730703. The next prime is 320730727. The reversal of 320730713 is 317037023.

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., 224160784 + 96569929 = 14972^2 + 9827^2 .

It is a cyclic number.

It is not a de Polignac number, because 320730713 - 2⁶ = 320730649 is a prime.

It is a super-2 number, since 2×320730713² = 205736380522976738, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (320730703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160365356 + 160365357.

It is an arithmetic number, because the mean of its divisors is an integer number (160365357).

Almost surely, 2^320730713 is an apocalyptic number.

It is an amenable number.

320730713 is a deficient number, since it is larger than the sum of its proper divisors (1).

320730713 is an equidigital number, since it uses as much as digits as its factorization.

320730713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2646, while the sum is 26.

The square root of 320730713 is about 17908.9562230745. The cubic root of 320730713 is about 684.5106085826.

Adding to 320730713 its reverse (317037023), we get a palindrome (637767736).

The spelling of 320730713 in words is "three hundred twenty million, seven hundred thirty thousand, seven hundred thirteen".