321319073 has 2 divisors, whose sum is σ = 321319074. Its totient is φ = 321319072.

The previous prime is 321319021. The next prime is 321319079. The reversal of 321319073 is 370913123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253223569 + 68095504 = 15913^2 + 8252^2 .

It is a cyclic number.

It is not a de Polignac number, because 321319073 - 2⁸ = 321318817 is a prime.

It is not a weakly prime, because it can be changed into another prime (321319079) 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, 160659536 + 160659537.

It is an arithmetic number, because the mean of its divisors is an integer number (160659537).

Almost surely, 2^321319073 is an apocalyptic number.

It is an amenable number.

321319073 is a deficient number, since it is larger than the sum of its proper divisors (1).

321319073 is an equidigital number, since it uses as much as digits as its factorization.

321319073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 29.

The square root of 321319073 is about 17925.3751146245. The cubic root of 321319073 is about 684.9289165587.

The spelling of 321319073 in words is "three hundred twenty-one million, three hundred nineteen thousand, seventy-three".