189245945 has 16 divisors (see below), whose sum is σ = 259760640. Its totient is φ = 129657024.

The previous prime is 189245939. The next prime is 189245963. The reversal of 189245945 is 549542981.

It is a happy number.

It is not a de Polignac number, because 189245945 - 2⁴ = 189245929 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 189245945.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 78224 + ... + 80606.

It is an arithmetic number, because the mean of its divisors is an integer number (16235040).

Almost surely, 2^189245945 is an apocalyptic number.

It is an amenable number.

189245945 is a deficient number, since it is larger than the sum of its proper divisors (70514695).

189245945 is a wasteful number, since it uses less digits than its factorization.

189245945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4664.

The product of its digits is 518400, while the sum is 47.

The square root of 189245945 is about 13756.6691099263. The cubic root of 189245945 is about 574.1281759592.

The spelling of 189245945 in words is "one hundred eighty-nine million, two hundred forty-five thousand, nine hundred forty-five".