173285213 has 2 divisors, whose sum is σ = 173285214. Its totient is φ = 173285212.

The previous prime is 173285191. The next prime is 173285221. The reversal of 173285213 is 312582371.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172712164 + 573049 = 13142^2 + 757^2 .

It is a cyclic number.

It is not a de Polignac number, because 173285213 - 2¹² = 173281117 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 173285213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173285513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86642606 + 86642607.

It is an arithmetic number, because the mean of its divisors is an integer number (86642607).

Almost surely, 2^173285213 is an apocalyptic number.

It is an amenable number.

173285213 is a deficient number, since it is larger than the sum of its proper divisors (1).

173285213 is an equidigital number, since it uses as much as digits as its factorization.

173285213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 32.

The square root of 173285213 is about 13163.7841443864. The cubic root of 173285213 is about 557.5115059930.

The spelling of 173285213 in words is "one hundred seventy-three million, two hundred eighty-five thousand, two hundred thirteen".