320004039973 has 2 divisors, whose sum is σ = 320004039974. Its totient is φ = 320004039972.

The previous prime is 320004039959. The next prime is 320004040007. The reversal of 320004039973 is 379930400023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 316561519044 + 3442520929 = 562638^2 + 58673^2 .

It is an emirp because it is prime and its reverse (379930400023) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320004039973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320004039923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160002019986 + 160002019987.

It is an arithmetic number, because the mean of its divisors is an integer number (160002019987).

Almost surely, 2^320004039973 is an apocalyptic number.

It is an amenable number.

320004039973 is a deficient number, since it is larger than the sum of its proper divisors (1).

320004039973 is an equidigital number, since it uses as much as digits as its factorization.

320004039973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 40.

Adding to 320004039973 its reverse (379930400023), we get a palindrome (699934439996).

The spelling of 320004039973 in words is "three hundred twenty billion, four million, thirty-nine thousand, nine hundred seventy-three".