173286161 has 2 divisors, whose sum is σ = 173286162. Its totient is φ = 173286160.

The previous prime is 173286143. The next prime is 173286193. The reversal of 173286161 is 161682371.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122235136 + 51051025 = 11056^2 + 7145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-173286161 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (173286121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86643080 + 86643081.

It is an arithmetic number, because the mean of its divisors is an integer number (86643081).

Almost surely, 2^173286161 is an apocalyptic number.

It is an amenable number.

173286161 is a deficient number, since it is larger than the sum of its proper divisors (1).

173286161 is an equidigital number, since it uses as much as digits as its factorization.

173286161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 173286161 is about 13163.8201522203. The cubic root of 173286161 is about 557.5125226597.

The spelling of 173286161 in words is "one hundred seventy-three million, two hundred eighty-six thousand, one hundred sixty-one".