189242647 has 4 divisors (see below), whose sum is σ = 206446536. Its totient is φ = 172038760.

The previous prime is 189242611. The next prime is 189242663. The reversal of 189242647 is 746242981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189242647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189245647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8601928 + ... + 8601949.

It is an arithmetic number, because the mean of its divisors is an integer number (51611634).

Almost surely, 2^189242647 is an apocalyptic number.

189242647 is a deficient number, since it is larger than the sum of its proper divisors (17203889).

189242647 is a wasteful number, since it uses less digits than its factorization.

189242647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17203888.

The product of its digits is 193536, while the sum is 43.

The square root of 189242647 is about 13756.5492402710. The cubic root of 189242647 is about 574.1248408182.

The spelling of 189242647 in words is "one hundred eighty-nine million, two hundred forty-two thousand, six hundred forty-seven".