999999994 has 8 divisors (see below), whose sum is σ = 1714285728. Its totient is φ = 428571420.

The previous prime is 999999937. The next prime is 1000000007. The reversal of 999999994 is 499999999.

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.

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 3 ways as a sum of consecutive naturals, for example, 35714272 + ... + 35714299.

It is an arithmetic number, because the mean of its divisors is an integer number (214285716).

Almost surely, 2^999999994 is an apocalyptic number.

999999994 is a deficient number, since it is larger than the sum of its proper divisors (714285734).

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 product of its digits is 172186884, while the sum is 76.

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".