204115169 has 2 divisors, whose sum is σ = 204115170. Its totient is φ = 204115168.

The previous prime is 204115151. The next prime is 204115183. The reversal of 204115169 is 961511402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149132944 + 54982225 = 12212^2 + 7415^2 .

It is a cyclic number.

It is not a de Polignac number, because 204115169 - 2¹² = 204111073 is a prime.

It is a super-2 number, since 2×204115169² = 83326004431797122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204115139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102057584 + 102057585.

It is an arithmetic number, because the mean of its divisors is an integer number (102057585).

Almost surely, 2^204115169 is an apocalyptic number.

It is an amenable number.

204115169 is a deficient number, since it is larger than the sum of its proper divisors (1).

204115169 is an equidigital number, since it uses as much as digits as its factorization.

204115169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 204115169 is about 14286.8880096402. Note that the first 3 decimals coincide. The cubic root of 204115169 is about 588.7872907293.

The spelling of 204115169 in words is "two hundred four million, one hundred fifteen thousand, one hundred sixty-nine".