404016869 has 2 divisors, whose sum is σ = 404016870. Its totient is φ = 404016868.

The previous prime is 404016857. The next prime is 404016887. The reversal of 404016869 is 968610404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 372991969 + 31024900 = 19313^2 + 5570^2 .

It is a cyclic number.

It is not a de Polignac number, because 404016869 - 2¹² = 404012773 is a prime.

It is a super-2 number, since 2×404016869² = 326459260873126322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404016839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202008434 + 202008435.

It is an arithmetic number, because the mean of its divisors is an integer number (202008435).

Almost surely, 2^404016869 is an apocalyptic number.

It is an amenable number.

404016869 is a deficient number, since it is larger than the sum of its proper divisors (1).

404016869 is an equidigital number, since it uses as much as digits as its factorization.

404016869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 404016869 is about 20100.1708699205. The cubic root of 404016869 is about 739.2644682021.

The spelling of 404016869 in words is "four hundred four million, sixteen thousand, eight hundred sixty-nine".