205189029 has 6 divisors (see below), whose sum is σ = 296384166. Its totient is φ = 136792680.

The previous prime is 205188989. The next prime is 205189043. The reversal of 205189029 is 920981502.

It can be written as a sum of positive squares in only one way, i.e., 199572129 + 5616900 = 14127^2 + 2370^2 .

It is not a de Polignac number, because 205189029 - 2²⁴ = 188411813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205188984 and 205189002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205189069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11399382 + ... + 11399399.

It is an arithmetic number, because the mean of its divisors is an integer number (49397361).

Almost surely, 2^205189029 is an apocalyptic number.

It is an amenable number.

205189029 is a deficient number, since it is larger than the sum of its proper divisors (91195137).

205189029 is a wasteful number, since it uses less digits than its factorization.

205189029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22798787 (or 22798784 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 205189029 is about 14324.4207212718. The cubic root of 205189029 is about 589.8180315971.

The spelling of 205189029 in words is "two hundred five million, one hundred eighty-nine thousand, twenty-nine".