321849013 has 2 divisors, whose sum is σ = 321849014. Its totient is φ = 321849012.

The previous prime is 321848957. The next prime is 321849103. The reversal of 321849013 is 310948123.

Together with next prime (321849103) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319086769 + 2762244 = 17863^2 + 1662^2 .

It is an emirp because it is prime and its reverse (310948123) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321849013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321849613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160924506 + 160924507.

It is an arithmetic number, because the mean of its divisors is an integer number (160924507).

Almost surely, 2^321849013 is an apocalyptic number.

It is an amenable number.

321849013 is a deficient number, since it is larger than the sum of its proper divisors (1).

321849013 is an equidigital number, since it uses as much as digits as its factorization.

321849013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 321849013 is about 17940.1508633568. The cubic root of 321849013 is about 685.3052526246.

The spelling of 321849013 in words is "three hundred twenty-one million, eight hundred forty-nine thousand, thirteen".