173320613 has 2 divisors, whose sum is σ = 173320614. Its totient is φ = 173320612.

The previous prime is 173320591. The next prime is 173320639. The reversal of 173320613 is 316023371.

It is an a-pointer prime, because the next prime (173320639) can be obtained adding 173320613 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173238244 + 82369 = 13162^2 + 287^2 .

It is a cyclic number.

It is not a de Polignac number, because 173320613 - 2¹⁰ = 173319589 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 (173320673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86660306 + 86660307.

It is an arithmetic number, because the mean of its divisors is an integer number (86660307).

Almost surely, 2^173320613 is an apocalyptic number.

It is an amenable number.

173320613 is a deficient number, since it is larger than the sum of its proper divisors (1).

173320613 is an equidigital number, since it uses as much as digits as its factorization.

173320613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 26.

The square root of 173320613 is about 13165.1286738869. The cubic root of 173320613 is about 557.5494676155.

Adding to 173320613 its reverse (316023371), we get a palindrome (489343984).

The spelling of 173320613 in words is "one hundred seventy-three million, three hundred twenty thousand, six hundred thirteen".