166193 has 4 divisors (see below), whose sum is σ = 174960. Its totient is φ = 157428.

The previous prime is 166189. The next prime is 166207. The reversal of 166193 is 391661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 166193 - 2² = 166189 is a prime.

It is a super-2 number, since 2×166193² = 55240226498, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (166183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4355 + ... + 4392.

It is an arithmetic number, because the mean of its divisors is an integer number (43740).

2¹⁶⁶¹⁹³ is an apocalyptic number.

It is an amenable number.

166193 is a deficient number, since it is larger than the sum of its proper divisors (8767).

166193 is an equidigital number, since it uses as much as digits as its factorization.

166193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8766.

The product of its digits is 972, while the sum is 26.

The square root of 166193 is about 407.6677568805. The cubic root of 166193 is about 54.9799375863.

The spelling of 166193 in words is "one hundred sixty-six thousand, one hundred ninety-three".