189542717 has 8 divisors (see below), whose sum is σ = 233283456. Its totient is φ = 149967792.

The previous prime is 189542699. The next prime is 189542723. The reversal of 189542717 is 717245981.

189542717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 189542717 - 2¹⁴ = 189526333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189542767) 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, 1041353 + ... + 1041534.

It is an arithmetic number, because the mean of its divisors is an integer number (29160432).

Almost surely, 2^189542717 is an apocalyptic number.

It is an amenable number.

189542717 is a deficient number, since it is larger than the sum of its proper divisors (43740739).

189542717 is a wasteful number, since it uses less digits than its factorization.

189542717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2082907.

The product of its digits is 141120, while the sum is 44.

The square root of 189542717 is about 13767.4513618171. The cubic root of 189542717 is about 574.4281316238.

The spelling of 189542717 in words is "one hundred eighty-nine million, five hundred forty-two thousand, seven hundred seventeen".