189218107 has 16 divisors (see below), whose sum is σ = 206938368. Its totient is φ = 171972000.

The previous prime is 189218101. The next prime is 189218119. The reversal of 189218107 is 701812981.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189218107 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (189218101) 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 in 15 ways as a sum of consecutive naturals, for example, 335808 + ... + 336370.

It is an arithmetic number, because the mean of its divisors is an integer number (12933648).

Almost surely, 2^189218107 is an apocalyptic number.

189218107 is a deficient number, since it is larger than the sum of its proper divisors (17720261).

189218107 is a wasteful number, since it uses less digits than its factorization.

189218107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930.

The product of its (nonzero) digits is 8064, while the sum is 37.

The square root of 189218107 is about 13755.6572725552. The cubic root of 189218107 is about 574.1000232399.

It can be divided in two parts, 18921 and 8107, that added together give a triangular number (27028 = T₂₃₂).

The spelling of 189218107 in words is "one hundred eighty-nine million, two hundred eighteen thousand, one hundred seven".