999079905 has 8 divisors (see below), whose sum is σ = 1598527872. Its totient is φ = 532842608.

The previous prime is 999079903. The next prime is 999079933. The reversal of 999079905 is 509970999.

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 999079905 - 2¹ = 999079903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999079903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33302649 + ... + 33302678.

It is an arithmetic number, because the mean of its divisors is an integer number (199815984).

Almost surely, 2^999079905 is an apocalyptic number.

It is an amenable number.

999079905 is a deficient number, since it is larger than the sum of its proper divisors (599447967).

999079905 is a wasteful number, since it uses less digits than its factorization.

999079905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66605335.

The product of its (nonzero) digits is 2066715, while the sum is 57.

The square root of 999079905 is about 31608.2252744440. The cubic root of 999079905 is about 999.6932075547.

The spelling of 999079905 in words is "nine hundred ninety-nine million, seventy-nine thousand, nine hundred five".