189166543 has 2 divisors, whose sum is σ = 189166544. Its totient is φ = 189166542.

The previous prime is 189166529. The next prime is 189166547. The reversal of 189166543 is 345661981.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189166543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189166543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189166547) 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 as a sum of consecutive naturals, namely, 94583271 + 94583272.

It is an arithmetic number, because the mean of its divisors is an integer number (94583272).

Almost surely, 2^189166543 is an apocalyptic number.

189166543 is a deficient number, since it is larger than the sum of its proper divisors (1).

189166543 is an equidigital number, since it uses as much as digits as its factorization.

189166543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The square root of 189166543 is about 13753.7828614531. The cubic root of 189166543 is about 574.0478689940.

The spelling of 189166543 in words is "one hundred eighty-nine million, one hundred sixty-six thousand, five hundred forty-three".