173122013 has 2 divisors, whose sum is σ = 173122014. Its totient is φ = 173122012.

The previous prime is 173122007. The next prime is 173122021. The reversal of 173122013 is 310221371.

173122013 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., 117440569 + 55681444 = 10837^2 + 7462^2 .

It is a cyclic number.

It is not a de Polignac number, because 173122013 - 2¹⁴ = 173105629 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173122513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86561006 + 86561007.

It is an arithmetic number, because the mean of its divisors is an integer number (86561007).

Almost surely, 2^173122013 is an apocalyptic number.

It is an amenable number.

173122013 is a deficient number, since it is larger than the sum of its proper divisors (1).

173122013 is an equidigital number, since it uses as much as digits as its factorization.

173122013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 173122013 is about 13157.5838587485. The cubic root of 173122013 is about 557.3364295883.

Adding to 173122013 its reverse (310221371), we get a palindrome (483343384).

The spelling of 173122013 in words is "one hundred seventy-three million, one hundred twenty-two thousand, thirteen".