189494543 has 8 divisors (see below), whose sum is σ = 227963520. Its totient is φ = 153875160.

The previous prime is 189494531. The next prime is 189494549. The reversal of 189494543 is 345494981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189494543 - 2¹⁶ = 189429007 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189494549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 712253 + ... + 712518.

It is an arithmetic number, because the mean of its divisors is an integer number (28495440).

Almost surely, 2^189494543 is an apocalyptic number.

189494543 is a deficient number, since it is larger than the sum of its proper divisors (38468977).

189494543 is a wasteful number, since it uses less digits than its factorization.

189494543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424797.

The product of its digits is 622080, while the sum is 47.

The square root of 189494543 is about 13765.7016893437. The cubic root of 189494543 is about 574.3794621277.

The spelling of 189494543 in words is "one hundred eighty-nine million, four hundred ninety-four thousand, five hundred forty-three".