189982945 has 8 divisors (see below), whose sum is σ = 229997736. Its totient is φ = 150640896.

The previous prime is 189982907. The next prime is 189982963. The reversal of 189982945 is 549289981.

189982945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 15108769 + 174874176 = 3887^2 + 13224^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 189982945 - 2⁷ = 189982817 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167562 + ... + 168691.

It is an arithmetic number, because the mean of its divisors is an integer number (28749717).

Almost surely, 2^189982945 is an apocalyptic number.

It is an amenable number.

189982945 is a deficient number, since it is larger than the sum of its proper divisors (40014791).

189982945 is a wasteful number, since it uses less digits than its factorization.

189982945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336371.

The product of its digits is 1866240, while the sum is 55.

The square root of 189982945 is about 13783.4300883343. The cubic root of 189982945 is about 574.8725060746.

The spelling of 189982945 in words is "one hundred eighty-nine million, nine hundred eighty-two thousand, nine hundred forty-five".