321343493 has 2 divisors, whose sum is σ = 321343494. Its totient is φ = 321343492.

The previous prime is 321343487. The next prime is 321343499. The reversal of 321343493 is 394343123.

It is a balanced prime because it is at equal distance from previous prime (321343487) and next prime (321343499).

It can be written as a sum of positive squares in only one way, i.e., 180042724 + 141300769 = 13418^2 + 11887^2 .

It is an emirp because it is prime and its reverse (394343123) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321343493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321343499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160671746 + 160671747.

It is an arithmetic number, because the mean of its divisors is an integer number (160671747).

Almost surely, 2^321343493 is an apocalyptic number.

It is an amenable number.

321343493 is a deficient number, since it is larger than the sum of its proper divisors (1).

321343493 is an equidigital number, since it uses as much as digits as its factorization.

321343493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 32.

The square root of 321343493 is about 17926.0562589768. The cubic root of 321343493 is about 684.9462674744.

The spelling of 321343493 in words is "three hundred twenty-one million, three hundred forty-three thousand, four hundred ninety-three".