189030973 has 4 divisors (see below), whose sum is σ = 200150460. Its totient is φ = 177911488.

The previous prime is 189030971. The next prime is 189031013. The reversal of 189030973 is 379030981.

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

It can be written as a sum of positive squares in 2 ways, for example, as 55905529 + 133125444 = 7477^2 + 11538^2 .

It is a cyclic number.

It is not a de Polignac number, because 189030973 - 2¹ = 189030971 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189030971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5559718 + ... + 5559751.

It is an arithmetic number, because the mean of its divisors is an integer number (50037615).

Almost surely, 2^189030973 is an apocalyptic number.

It is an amenable number.

189030973 is a deficient number, since it is larger than the sum of its proper divisors (11119487).

189030973 is a wasteful number, since it uses less digits than its factorization.

189030973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11119486.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 189030973 is about 13748.8535158391. The cubic root of 189030973 is about 573.9107019118.

The spelling of 189030973 in words is "one hundred eighty-nine million, thirty thousand, nine hundred seventy-three".