204235189 has 2 divisors, whose sum is σ = 204235190. Its totient is φ = 204235188.

The previous prime is 204235169. The next prime is 204235243. The reversal of 204235189 is 981532402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190854225 + 13380964 = 13815^2 + 3658^2 .

It is a cyclic number.

It is not a de Polignac number, because 204235189 - 2⁹ = 204234677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204235159) 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 as a sum of consecutive naturals, namely, 102117594 + 102117595.

It is an arithmetic number, because the mean of its divisors is an integer number (102117595).

Almost surely, 2^204235189 is an apocalyptic number.

It is an amenable number.

204235189 is a deficient number, since it is larger than the sum of its proper divisors (1).

204235189 is an equidigital number, since it uses as much as digits as its factorization.

204235189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 204235189 is about 14291.0877472640. The cubic root of 204235189 is about 588.9026706965.

The spelling of 204235189 in words is "two hundred four million, two hundred thirty-five thousand, one hundred eighty-nine".