404999999 has 4 divisors (see below), whose sum is σ = 405312600. Its totient is φ = 404687400.

The previous prime is 404999983. The next prime is 405000041. The reversal of 404999999 is 999999404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 404999999 - 2⁴ = 404999983 is a prime.

It is a Duffinian number.

404999999 is a modest number, since divided by 99999 gives 4049 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404999909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154349 + ... + 156950.

It is an arithmetic number, because the mean of its divisors is an integer number (101328150).

Almost surely, 2^404999999 is an apocalyptic number.

404999999 is a deficient number, since it is larger than the sum of its proper divisors (312601).

404999999 is a wasteful number, since it uses less digits than its factorization.

404999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312600.

The product of its (nonzero) digits is 8503056, while the sum is 62.

The square root of 404999999 is about 20124.6117726529. The cubic root of 404999999 is about 739.8636216902.

The spelling of 404999999 in words is "four hundred four million, nine hundred ninety-nine thousand, nine hundred ninety-nine".