166923 has 12 divisors (see below), whose sum is σ = 255528. Its totient is φ = 104640.

The previous prime is 166919. The next prime is 166931. The reversal of 166923 is 329661.

It is a happy number.

It is not a de Polignac number, because 166923 - 2² = 166919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166973) 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 11 ways as a sum of consecutive naturals, for example, 393 + ... + 698.

It is an arithmetic number, because the mean of its divisors is an integer number (21294).

2¹⁶⁶⁹²³ is an apocalyptic number.

166923 is a deficient number, since it is larger than the sum of its proper divisors (88605).

166923 is a wasteful number, since it uses less digits than its factorization.

166923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114 (or 1111 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 166923 is about 408.5621127809. The cubic root of 166923 is about 55.0603194973.

It can be divided in two parts, 166 and 923, that added together give a square (1089 = 33²).

The spelling of 166923 in words is "one hundred sixty-six thousand, nine hundred twenty-three".