404888369 has 2 divisors, whose sum is σ = 404888370. Its totient is φ = 404888368.

The previous prime is 404888333. The next prime is 404888411. The reversal of 404888369 is 963888404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 309337744 + 95550625 = 17588^2 + 9775^2 .

It is a cyclic number.

It is not a de Polignac number, because 404888369 - 2¹⁶ = 404822833 is a prime.

It is a super-2 number, since 2×404888369² = 327869182702960322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (404888329) 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, 202444184 + 202444185.

It is an arithmetic number, because the mean of its divisors is an integer number (202444185).

Almost surely, 2^404888369 is an apocalyptic number.

It is an amenable number.

404888369 is a deficient number, since it is larger than the sum of its proper divisors (1).

404888369 is an equidigital number, since it uses as much as digits as its factorization.

404888369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1327104, while the sum is 50.

The square root of 404888369 is about 20121.8381118624. The cubic root of 404888369 is about 739.7956393317.

The spelling of 404888369 in words is "four hundred four million, eight hundred eighty-eight thousand, three hundred sixty-nine".