320164813 has 2 divisors, whose sum is σ = 320164814. Its totient is φ = 320164812.

The previous prime is 320164771. The next prime is 320164829. The reversal of 320164813 is 318461023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 318729609 + 1435204 = 17853^2 + 1198^2 .

It is a cyclic number.

It is not a de Polignac number, because 320164813 - 2²¹ = 318067661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320164513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160082406 + 160082407.

It is an arithmetic number, because the mean of its divisors is an integer number (160082407).

Almost surely, 2^320164813 is an apocalyptic number.

It is an amenable number.

320164813 is a deficient number, since it is larger than the sum of its proper divisors (1).

320164813 is an equidigital number, since it uses as much as digits as its factorization.

320164813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 320164813 is about 17893.1498903910. The cubic root of 320164813 is about 684.1077861272.

The spelling of 320164813 in words is "three hundred twenty million, one hundred sixty-four thousand, eight hundred thirteen".