321438107 has 2 divisors, whose sum is σ = 321438108. Its totient is φ = 321438106.

The previous prime is 321438071. The next prime is 321438121. The reversal of 321438107 is 701834123.

Together with previous prime (321438071) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (701834123) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321438107 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 321438107.

It is not a weakly prime, because it can be changed into another prime (321438137) 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, 160719053 + 160719054.

It is an arithmetic number, because the mean of its divisors is an integer number (160719054).

Almost surely, 2^321438107 is an apocalyptic number.

321438107 is a deficient number, since it is larger than the sum of its proper divisors (1).

321438107 is an equidigital number, since it uses as much as digits as its factorization.

321438107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 321438107 is about 17928.6950724251. The cubic root of 321438107 is about 685.0134843812.

The spelling of 321438107 in words is "three hundred twenty-one million, four hundred thirty-eight thousand, one hundred seven".