166105193 has 2 divisors, whose sum is σ = 166105194. Its totient is φ = 166105192.

The previous prime is 166105171. The next prime is 166105211. The reversal of 166105193 is 391501661.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131859289 + 34245904 = 11483^2 + 5852^2 .

It is a cyclic number.

It is not a de Polignac number, because 166105193 - 2⁸ = 166104937 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 (166105133) 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, 83052596 + 83052597.

It is an arithmetic number, because the mean of its divisors is an integer number (83052597).

Almost surely, 2^166105193 is an apocalyptic number.

It is an amenable number.

166105193 is a deficient number, since it is larger than the sum of its proper divisors (1).

166105193 is an equidigital number, since it uses as much as digits as its factorization.

166105193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 166105193 is about 12888.1803603146. The cubic root of 166105193 is about 549.7025311533.

The spelling of 166105193 in words is "one hundred sixty-six million, one hundred five thousand, one hundred ninety-three".