999959992 has 32 divisors (see below), whose sum is σ = 2014863120. Its totient is φ = 463541760.

The previous prime is 999959981. The next prime is 999959993. The reversal of 999959992 is 299959999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999959993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45759 + ... + 63982.

Almost surely, 2^999959992 is an apocalyptic number.

It is an amenable number.

999959992 is an abundant number, since it is smaller than the sum of its proper divisors (1014903128).

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

999959992 is a wasteful number, since it uses less digits than its factorization.

999959992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109831 (or 109827 counting only the distinct ones).

The product of its digits is 47829690, while the sum is 70.

The square root of 999959992 is about 31622.1440133334. The cubic root of 999959992 is about 999.9866638221.

The spelling of 999959992 in words is "nine hundred ninety-nine million, nine hundred fifty-nine thousand, nine hundred ninety-two".