320620213 has 2 divisors, whose sum is σ = 320620214. Its totient is φ = 320620212.

The previous prime is 320620199. The next prime is 320620217. The reversal of 320620213 is 312026023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220760164 + 99860049 = 14858^2 + 9993^2 .

It is an emirp because it is prime and its reverse (312026023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320620213 - 2¹³ = 320612021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320620217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160310106 + 160310107.

It is an arithmetic number, because the mean of its divisors is an integer number (160310107).

Almost surely, 2^320620213 is an apocalyptic number.

It is an amenable number.

320620213 is a deficient number, since it is larger than the sum of its proper divisors (1).

320620213 is an equidigital number, since it uses as much as digits as its factorization.

320620213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 320620213 is about 17905.8709087271. The cubic root of 320620213 is about 684.4319890354.

Adding to 320620213 its reverse (312026023), we get a palindrome (632646236).

The spelling of 320620213 in words is "three hundred twenty million, six hundred twenty thousand, two hundred thirteen".