999947994 has 8 divisors (see below), whose sum is σ = 1999896000. Its totient is φ = 333315996.

The previous prime is 999947987. The next prime is 999948011. The reversal of 999947994 is 499749999.

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

999947994 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83328994 + ... + 83329005.

It is an arithmetic number, because the mean of its divisors is an integer number (249987000).

Almost surely, 2^999947994 is an apocalyptic number.

999947994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999947994 is a wasteful number, since it uses less digits than its factorization.

999947994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166658004.

The product of its digits is 59521392, while the sum is 69.

The square root of 999947994 is about 31621.9543039326. The cubic root of 999947994 is about 999.9826643661.

The spelling of 999947994 in words is "nine hundred ninety-nine million, nine hundred forty-seven thousand, nine hundred ninety-four".