320673599273 has 2 divisors, whose sum is σ = 320673599274. Its totient is φ = 320673599272.

The previous prime is 320673599237. The next prime is 320673599329. The reversal of 320673599273 is 372995376023.

It is a happy number.

Together with previous prime (320673599237) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (320673599329) can be obtained adding 320673599273 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249123769129 + 71549830144 = 499123^2 + 267488^2 .

It is a cyclic number.

It is not a de Polignac number, because 320673599273 - 2²⁸ = 320405163817 is a prime.

It is a super-2 number, since 2×320673599273² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (320673569273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160336799636 + 160336799637.

It is an arithmetic number, because the mean of its divisors is an integer number (160336799637).

Almost surely, 2^320673599273 is an apocalyptic number.

It is an amenable number.

320673599273 is a deficient number, since it is larger than the sum of its proper divisors (1).

320673599273 is an equidigital number, since it uses as much as digits as its factorization.

320673599273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12859560, while the sum is 56.

The spelling of 320673599273 in words is "three hundred twenty billion, six hundred seventy-three million, five hundred ninety-nine thousand, two hundred seventy-three".