204508069 has 2 divisors, whose sum is σ = 204508070. Its totient is φ = 204508068.

The previous prime is 204508009. The next prime is 204508081. The reversal of 204508069 is 960805402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169260100 + 35247969 = 13010^2 + 5937^2 .

It is a cyclic number.

It is not a de Polignac number, because 204508069 - 2⁹ = 204507557 is a prime.

It is a super-2 number, since 2×204508069² = 83647100572217522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204508009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102254034 + 102254035.

It is an arithmetic number, because the mean of its divisors is an integer number (102254035).

Almost surely, 2^204508069 is an apocalyptic number.

It is an amenable number.

204508069 is a deficient number, since it is larger than the sum of its proper divisors (1).

204508069 is an equidigital number, since it uses as much as digits as its factorization.

204508069 is an evil number, because the sum of its binary digits is even.

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

The square root of 204508069 is about 14300.6317692611. The cubic root of 204508069 is about 589.1648329027.

The spelling of 204508069 in words is "two hundred four million, five hundred eight thousand, sixty-nine".