320847742393 has 2 divisors, whose sum is σ = 320847742394. Its totient is φ = 320847742392.

The previous prime is 320847742367. The next prime is 320847742399. The reversal of 320847742393 is 393247748023.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 292218087184 + 28629655209 = 540572^2 + 169203^2 .

It is a cyclic number.

It is not a de Polignac number, because 320847742393 - 2⁵ = 320847742361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320847742393.

It is not a weakly prime, because it can be changed into another prime (320847742399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160423871196 + 160423871197.

It is an arithmetic number, because the mean of its divisors is an integer number (160423871197).

Almost surely, 2^320847742393 is an apocalyptic number.

It is an amenable number.

320847742393 is a deficient number, since it is larger than the sum of its proper divisors (1).

320847742393 is an equidigital number, since it uses as much as digits as its factorization.

320847742393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6096384, while the sum is 52.

The spelling of 320847742393 in words is "three hundred twenty billion, eight hundred forty-seven million, seven hundred forty-two thousand, three hundred ninety-three".