173085397 has 2 divisors, whose sum is σ = 173085398. Its totient is φ = 173085396.

The previous prime is 173085361. The next prime is 173085463. The reversal of 173085397 is 793580371.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108347281 + 64738116 = 10409^2 + 8046^2 .

It is a cyclic number.

It is not a de Polignac number, because 173085397 - 2¹⁵ = 173052629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173085317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86542698 + 86542699.

It is an arithmetic number, because the mean of its divisors is an integer number (86542699).

Almost surely, 2^173085397 is an apocalyptic number.

It is an amenable number.

173085397 is a deficient number, since it is larger than the sum of its proper divisors (1).

173085397 is an equidigital number, since it uses as much as digits as its factorization.

173085397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 173085397 is about 13156.1923442917. The cubic root of 173085397 is about 557.2971338545.

The spelling of 173085397 in words is "one hundred seventy-three million, eighty-five thousand, three hundred ninety-seven".