189445339 has 4 divisors (see below), whose sum is σ = 190054800. Its totient is φ = 188835880.

The previous prime is 189445337. The next prime is 189445343. The reversal of 189445339 is 933544981.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 933544981 = 1901 ⋅491081.

It is a cyclic number.

It is not a de Polignac number, because 189445339 - 2¹ = 189445337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189445337) 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, 304264 + ... + 304885.

It is an arithmetic number, because the mean of its divisors is an integer number (47513700).

Almost surely, 2^189445339 is an apocalyptic number.

189445339 is a deficient number, since it is larger than the sum of its proper divisors (609461).

189445339 is an equidigital number, since it uses as much as digits as its factorization.

189445339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609460.

The product of its digits is 466560, while the sum is 46.

The square root of 189445339 is about 13763.9143778214. The cubic root of 189445339 is about 574.3297435218.

The spelling of 189445339 in words is "one hundred eighty-nine million, four hundred forty-five thousand, three hundred thirty-nine".