321355093 has 2 divisors, whose sum is σ = 321355094. Its totient is φ = 321355092.

The previous prime is 321355091. The next prime is 321355117. The reversal of 321355093 is 390553123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173659684 + 147695409 = 13178^2 + 12153^2 .

It is an emirp because it is prime and its reverse (390553123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321355093 - 2¹ = 321355091 is a prime.

Together with 321355091, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321355091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160677546 + 160677547.

It is an arithmetic number, because the mean of its divisors is an integer number (160677547).

Almost surely, 2^321355093 is an apocalyptic number.

It is an amenable number.

321355093 is a deficient number, since it is larger than the sum of its proper divisors (1).

321355093 is an equidigital number, since it uses as much as digits as its factorization.

321355093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12150, while the sum is 31.

The square root of 321355093 is about 17926.3798074235. The cubic root of 321355093 is about 684.9545092066.

The spelling of 321355093 in words is "three hundred twenty-one million, three hundred fifty-five thousand, ninety-three".