189117 has 6 divisors (see below), whose sum is σ = 273182. Its totient is φ = 126072.

The previous prime is 189067. The next prime is 189127. The reversal of 189117 is 711981.

It can be written as a sum of positive squares in only one way, i.e., 95481 + 93636 = 309^2 + 306^2 .

It is not a de Polignac number, because 189117 - 2⁸ = 188861 is a prime.

It is a Duffinian number.

189117 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10498 + ... + 10515.

2¹⁸⁹¹¹⁷ is an apocalyptic number.

It is an amenable number.

189117 is a deficient number, since it is larger than the sum of its proper divisors (84065).

189117 is a wasteful number, since it uses less digits than its factorization.

189117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21019 (or 21016 counting only the distinct ones).

The product of its digits is 504, while the sum is 27.

The square root of 189117 is about 434.8758443510. The cubic root of 189117 is about 57.3997749954.

The spelling of 189117 in words is "one hundred eighty-nine thousand, one hundred seventeen".