404969 has 2 divisors, whose sum is σ = 404970. Its totient is φ = 404968.

The previous prime is 404959. The next prime is 404977. The reversal of 404969 is 969404.

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., 235225 + 169744 = 485^2 + 412^2 .

It is a cyclic number.

It is not a de Polignac number, because 404969 - 2⁸ = 404713 is a prime.

It is a super-2 number, since 2×404969² = 327999781922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (404959) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202484 + 202485.

It is an arithmetic number, because the mean of its divisors is an integer number (202485).

2⁴⁰⁴⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

404969 is a deficient number, since it is larger than the sum of its proper divisors (1).

404969 is an equidigital number, since it uses as much as digits as its factorization.

404969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 404969 is about 636.3717467016. The cubic root of 404969 is about 73.9844744639.

The spelling of 404969 in words is "four hundred four thousand, nine hundred sixty-nine".