820310604173 has 2 divisors, whose sum is σ = 820310604174. Its totient is φ = 820310604172.

The previous prime is 820310604089. The next prime is 820310604181. The reversal of 820310604173 is 371406013028.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 815775659209 + 4534944964 = 903203^2 + 67342^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-820310604173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (820310654173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410155302086 + 410155302087.

It is an arithmetic number, because the mean of its divisors is an integer number (410155302087).

Almost surely, 2^820310604173 is an apocalyptic number.

It is an amenable number.

820310604173 is a deficient number, since it is larger than the sum of its proper divisors (1).

820310604173 is an equidigital number, since it uses as much as digits as its factorization.

820310604173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The spelling of 820310604173 in words is "eight hundred twenty billion, three hundred ten million, six hundred four thousand, one hundred seventy-three".