166192189 has 2 divisors, whose sum is σ = 166192190. Its totient is φ = 166192188.

The previous prime is 166192171. The next prime is 166192211. The reversal of 166192189 is 981291661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99900025 + 66292164 = 9995^2 + 8142^2 .

It is a cyclic number.

It is not a de Polignac number, because 166192189 - 2⁵ = 166192157 is a prime.

It is a super-2 number, since 2×166192189² = 55239687369223442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166192589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83096094 + 83096095.

It is an arithmetic number, because the mean of its divisors is an integer number (83096095).

Almost surely, 2^166192189 is an apocalyptic number.

It is an amenable number.

166192189 is a deficient number, since it is larger than the sum of its proper divisors (1).

166192189 is an equidigital number, since it uses as much as digits as its factorization.

166192189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 43.

The square root of 166192189 is about 12891.5549488803. The cubic root of 166192189 is about 549.7984815451.

The spelling of 166192189 in words is "one hundred sixty-six million, one hundred ninety-two thousand, one hundred eighty-nine".