320729263 has 2 divisors, whose sum is σ = 320729264. Its totient is φ = 320729262.

The previous prime is 320729257. The next prime is 320729267. The reversal of 320729263 is 362927023.

It is a strong prime.

It is an emirp because it is prime and its reverse (362927023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320729263 - 2²⁵ = 287174831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320729267) 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, 160364631 + 160364632.

It is an arithmetic number, because the mean of its divisors is an integer number (160364632).

Almost surely, 2^320729263 is an apocalyptic number.

320729263 is a deficient number, since it is larger than the sum of its proper divisors (1).

320729263 is an equidigital number, since it uses as much as digits as its factorization.

320729263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 320729263 is about 17908.9157404908. The cubic root of 320729263 is about 684.5095770404.

The spelling of 320729263 in words is "three hundred twenty million, seven hundred twenty-nine thousand, two hundred sixty-three".