189660843 has 12 divisors (see below), whose sum is σ = 274360008. Its totient is φ = 126253440.

The previous prime is 189660833. The next prime is 189660881. The reversal of 189660843 is 348066981.

It is not a de Polignac number, because 189660843 - 2⁴ = 189660827 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (189660803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9030 + ... + 21467.

It is an arithmetic number, because the mean of its divisors is an integer number (22863334).

Almost surely, 2^189660843 is an apocalyptic number.

189660843 is a deficient number, since it is larger than the sum of its proper divisors (84699165).

189660843 is a wasteful number, since it uses less digits than its factorization.

189660843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31194 (or 31191 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 189660843 is about 13771.7407396451. The cubic root of 189660843 is about 574.5474377224.

The spelling of 189660843 in words is "one hundred eighty-nine million, six hundred sixty thousand, eight hundred forty-three".