404709869 has 4 divisors (see below), whose sum is σ = 410410080. Its totient is φ = 399009660.

The previous prime is 404709853. The next prime is 404709881. The reversal of 404709869 is 968907404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 404709869 - 2⁴ = 404709853 is a prime.

It is a super-2 number, since 2×404709869² = 327580156131994322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404709829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2849999 + ... + 2850140.

It is an arithmetic number, because the mean of its divisors is an integer number (102602520).

Almost surely, 2^404709869 is an apocalyptic number.

It is an amenable number.

404709869 is a deficient number, since it is larger than the sum of its proper divisors (5700211).

404709869 is an equidigital number, since it uses as much as digits as its factorization.

404709869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5700210.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 404709869 is about 20117.4021434180. The cubic root of 404709869 is about 739.6869073598.

The spelling of 404709869 in words is "four hundred four million, seven hundred nine thousand, eight hundred sixty-nine".