204818969 has 2 divisors, whose sum is σ = 204818970. Its totient is φ = 204818968.

The previous prime is 204818923. The next prime is 204818981. The reversal of 204818969 is 969818402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203347600 + 1471369 = 14260^2 + 1213^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204818969 is a prime.

It is a super-2 number, since 2×204818969² = 83901620124445922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204818269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102409484 + 102409485.

It is an arithmetic number, because the mean of its divisors is an integer number (102409485).

Almost surely, 2^204818969 is an apocalyptic number.

It is an amenable number.

204818969 is a deficient number, since it is larger than the sum of its proper divisors (1).

204818969 is an equidigital number, since it uses as much as digits as its factorization.

204818969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 204818969 is about 14311.4977902384. The cubic root of 204818969 is about 589.4632377606.

The spelling of 204818969 in words is "two hundred four million, eight hundred eighteen thousand, nine hundred sixty-nine".