999404999 has 8 divisors (see below), whose sum is σ = 1016681328. Its totient is φ = 982273600.

The previous prime is 999404969. The next prime is 999405013.

999404999 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 999404999 - 2²⁸ = 730969543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999404929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22277 + ... + 49950.

It is an arithmetic number, because the mean of its divisors is an integer number (127085166).

Almost surely, 2^999404999 is an apocalyptic number.

999404999 is a deficient number, since it is larger than the sum of its proper divisors (17276329).

999404999 is a wasteful number, since it uses less digits than its factorization.

999404999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72465.

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

The square root of 999404999 is about 31613.3674100055. The cubic root of 999404999 is about 999.8016269841.

The spelling of 999404999 in words is "nine hundred ninety-nine million, four hundred four thousand, nine hundred ninety-nine".