204115189 has 2 divisors, whose sum is σ = 204115190. Its totient is φ = 204115188.

The previous prime is 204115183. The next prime is 204115201. The reversal of 204115189 is 981511402.

It is a happy number.

204115189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104714289 + 99400900 = 10233^2 + 9970^2 .

It is a cyclic number.

It is not a de Polignac number, because 204115189 - 2⁷ = 204115061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204115189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204115183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102057594 + 102057595.

It is an arithmetic number, because the mean of its divisors is an integer number (102057595).

Almost surely, 2^204115189 is an apocalyptic number.

It is an amenable number.

204115189 is a deficient number, since it is larger than the sum of its proper divisors (1).

204115189 is an equidigital number, since it uses as much as digits as its factorization.

204115189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 204115189 is about 14286.8887095826. Note that the first 3 decimals coincide. The cubic root of 204115189 is about 588.7873099599.

It can be divided in two parts, 204115 and 189, that added together give a square (204304 = 452²).

The spelling of 204115189 in words is "two hundred four million, one hundred fifteen thousand, one hundred eighty-nine".