320123213 has 2 divisors, whose sum is σ = 320123214. Its totient is φ = 320123212.

The previous prime is 320123207. The next prime is 320123231. The reversal of 320123213 is 312321023.

Together with next prime (320123231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165817129 + 154306084 = 12877^2 + 12422^2 .

It is a cyclic number.

It is not a de Polignac number, because 320123213 - 2¹² = 320119117 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 320123191 and 320123200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320123113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160061606 + 160061607.

It is an arithmetic number, because the mean of its divisors is an integer number (160061607).

Almost surely, 2^320123213 is an apocalyptic number.

It is an amenable number.

320123213 is a deficient number, since it is larger than the sum of its proper divisors (1).

320123213 is an equidigital number, since it uses as much as digits as its factorization.

320123213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 320123213 is about 17891.9873965974. The cubic root of 320123213 is about 684.0781554334.

Adding to 320123213 its reverse (312321023), we get a palindrome (632444236).

The spelling of 320123213 in words is "three hundred twenty million, one hundred twenty-three thousand, two hundred thirteen".