321440968073 has 2 divisors, whose sum is σ = 321440968074. Its totient is φ = 321440968072.

The previous prime is 321440968039. The next prime is 321440968111. The reversal of 321440968073 is 370869044123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233533462009 + 87907506064 = 483253^2 + 296492^2 .

It is a cyclic number.

It is not a de Polignac number, because 321440968073 - 2²⁸ = 321172532617 is a prime.

It is not a weakly prime, because it can be changed into another prime (321440968033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160720484036 + 160720484037.

It is an arithmetic number, because the mean of its divisors is an integer number (160720484037).

Almost surely, 2^321440968073 is an apocalyptic number.

It is an amenable number.

321440968073 is a deficient number, since it is larger than the sum of its proper divisors (1).

321440968073 is an equidigital number, since it uses as much as digits as its factorization.

321440968073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 47.

The spelling of 321440968073 in words is "three hundred twenty-one billion, four hundred forty million, nine hundred sixty-eight thousand, seventy-three".