321120493 has 2 divisors, whose sum is σ = 321120494. Its totient is φ = 321120492.

The previous prime is 321120491. The next prime is 321120557. The reversal of 321120493 is 394021123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 226291849 + 94828644 = 15043^2 + 9738^2 .

It is an emirp because it is prime and its reverse (394021123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321120493 - 2¹ = 321120491 is a prime.

Together with 321120491, 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 (321120491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160560246 + 160560247.

It is an arithmetic number, because the mean of its divisors is an integer number (160560247).

Almost surely, 2^321120493 is an apocalyptic number.

It is an amenable number.

321120493 is a deficient number, since it is larger than the sum of its proper divisors (1).

321120493 is an equidigital number, since it uses as much as digits as its factorization.

321120493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 321120493 is about 17919.8351833938. The cubic root of 321120493 is about 684.7877887051.

The spelling of 321120493 in words is "three hundred twenty-one million, one hundred twenty thousand, four hundred ninety-three".