189738289 has 4 divisors (see below), whose sum is σ = 204333556. Its totient is φ = 175143024.

The previous prime is 189738281. The next prime is 189738323. The reversal of 189738289 is 982837981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 982837981 = 31 ⋅31704451.

It can be written as a sum of positive squares in 2 ways, for example, as 22165264 + 167573025 = 4708^2 + 12945^2 .

It is a cyclic number.

It is not a de Polignac number, because 189738289 - 2³ = 189738281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189738281) 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, 7297614 + ... + 7297639.

It is an arithmetic number, because the mean of its divisors is an integer number (51083389).

Almost surely, 2^189738289 is an apocalyptic number.

It is an amenable number.

189738289 is a deficient number, since it is larger than the sum of its proper divisors (14595267).

189738289 is a wasteful number, since it uses less digits than its factorization.

189738289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14595266.

The product of its digits is 1741824, while the sum is 55.

The square root of 189738289 is about 13774.5522250271. The cubic root of 189738289 is about 574.6256305375.

It can be divided in two parts, 1897 and 38289, that added together give a triangular number (40186 = T₂₈₃).

The spelling of 189738289 in words is "one hundred eighty-nine million, seven hundred thirty-eight thousand, two hundred eighty-nine".