It is a sphenic number, since it is the product of 3 distinct primes.
It is a nialpdrome in base 10.
It is a self number, because there is not a number n which added to its sum of digits gives 999999994.
It is an unprimeable number.
Almost surely, 2999999994 is an apocalyptic number.
999999994 is a wasteful number, since it uses less digits than its factorization.
999999994 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 71428580.
The square root of 999999994 is about 31622.7765068155. The cubic root of 999999994 is about 999.9999980000. Note that the first 5 decimals are identical.
The spelling of 999999994 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-four".