169990823473 has 2 divisors, whose sum is σ = 169990823474. Its totient is φ = 169990823472.

The previous prime is 169990823461. The next prime is 169990823489. The reversal of 169990823473 is 374328099961.

169990823473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135842370624 + 34148452849 = 368568^2 + 184793^2 .

It is a cyclic number.

It is not a de Polignac number, because 169990823473 - 2¹⁷ = 169990692401 is a prime.

It is not a weakly prime, because it can be changed into another prime (169990827473) 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, 84995411736 + 84995411737.

It is an arithmetic number, because the mean of its divisors is an integer number (84995411737).

Almost surely, 2^169990823473 is an apocalyptic number.

It is an amenable number.

169990823473 is a deficient number, since it is larger than the sum of its proper divisors (1).

169990823473 is an equidigital number, since it uses as much as digits as its factorization.

169990823473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17635968, while the sum is 61.

The spelling of 169990823473 in words is "one hundred sixty-nine billion, nine hundred ninety million, eight hundred twenty-three thousand, four hundred seventy-three".