189505671 has 8 divisors (see below), whose sum is σ = 263660160. Its totient is φ = 120844152.

The previous prime is 189505669. The next prime is 189505703. The reversal of 189505671 is 176505981.

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

It is not a de Polignac number, because 189505671 - 2¹ = 189505669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189505621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1373161 + ... + 1373298.

It is an arithmetic number, because the mean of its divisors is an integer number (32957520).

Almost surely, 2^189505671 is an apocalyptic number.

189505671 is a deficient number, since it is larger than the sum of its proper divisors (74154489).

189505671 is a wasteful number, since it uses less digits than its factorization.

189505671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2746485.

The product of its (nonzero) digits is 75600, while the sum is 42.

The square root of 189505671 is about 13766.1058763908. The cubic root of 189505671 is about 574.3907053179.

The spelling of 189505671 in words is "one hundred eighty-nine million, five hundred five thousand, six hundred seventy-one".