173380309 has 2 divisors, whose sum is σ = 173380310. Its totient is φ = 173380308.

The previous prime is 173380289. The next prime is 173380313. The reversal of 173380309 is 903083371.

173380309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164096100 + 9284209 = 12810^2 + 3047^2 .

It is an emirp because it is prime and its reverse (903083371) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 173380309 - 2¹⁵ = 173347541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173380369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86690154 + 86690155.

It is an arithmetic number, because the mean of its divisors is an integer number (86690155).

Almost surely, 2^173380309 is an apocalyptic number.

It is an amenable number.

173380309 is a deficient number, since it is larger than the sum of its proper divisors (1).

173380309 is an equidigital number, since it uses as much as digits as its factorization.

173380309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 173380309 is about 13167.3956802399. The cubic root of 173380309 is about 557.6134716443.

The spelling of 173380309 in words is "one hundred seventy-three million, three hundred eighty thousand, three hundred nine".