204040769 has 2 divisors, whose sum is σ = 204040770. Its totient is φ = 204040768.

The previous prime is 204040721. The next prime is 204040789. The reversal of 204040769 is 967040402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115455025 + 88585744 = 10745^2 + 9412^2 .

It is a cyclic number.

It is not a de Polignac number, because 204040769 - 2¹² = 204036673 is a prime.

It is a super-2 number, since 2×204040769² = 83265270828222722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204040789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102020384 + 102020385.

It is an arithmetic number, because the mean of its divisors is an integer number (102020385).

Almost surely, 2^204040769 is an apocalyptic number.

It is an amenable number.

204040769 is a deficient number, since it is larger than the sum of its proper divisors (1).

204040769 is an equidigital number, since it uses as much as digits as its factorization.

204040769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 204040769 is about 14284.2839862557. The cubic root of 204040769 is about 588.7157443598.

The spelling of 204040769 in words is "two hundred four million, forty thousand, seven hundred sixty-nine".