321315349 has 2 divisors, whose sum is σ = 321315350. Its totient is φ = 321315348.

The previous prime is 321315311. The next prime is 321315361. The reversal of 321315349 is 943513123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212634724 + 108680625 = 14582^2 + 10425^2 .

It is a cyclic number.

It is not a de Polignac number, because 321315349 - 2²⁷ = 187097621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 321315349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321315949) 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, 160657674 + 160657675.

It is an arithmetic number, because the mean of its divisors is an integer number (160657675).

Almost surely, 2^321315349 is an apocalyptic number.

It is an amenable number.

321315349 is a deficient number, since it is larger than the sum of its proper divisors (1).

321315349 is an equidigital number, since it uses as much as digits as its factorization.

321315349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 31.

The square root of 321315349 is about 17925.2712392309. The cubic root of 321315349 is about 684.9262705023.

The spelling of 321315349 in words is "three hundred twenty-one million, three hundred fifteen thousand, three hundred forty-nine".