1000000000999 has 8 divisors (see below), whose sum is σ = 1047635551872. Its totient is φ = 952710891000.

The previous prime is 1000000000997. The next prime is 1000000001051. The reversal of 1000000000999 is 9990000000001.

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 1000000000999 - 2¹ = 1000000000997 is a prime.

It is a Duffinian number.

1000000000999 is a modest number, since divided by 999 gives 1 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000000000997) 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, 86604309 + ... + 86615854.

It is an arithmetic number, because the mean of its divisors is an integer number (130954443984).

Almost surely, 2^{1000000000999} is an apocalyptic number.

1000000000999 is a deficient number, since it is larger than the sum of its proper divisors (47635550873).

1000000000999 is a wasteful number, since it uses less digits than its factorization.

1000000000999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173220437.

The product of its (nonzero) digits is 729, while the sum is 28.

The spelling of 1000000000999 in words is "one trillion, nine hundred ninety-nine", and thus it is an aban number.