999968499 has 12 divisors (see below), whose sum is σ = 1520420200. Its totient is φ = 631558944.

The previous prime is 999968477. The next prime is 999968513. The reversal of 999968499 is 994869999.

It is not a de Polignac number, because 999968499 - 2¹² = 999964403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999968429) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2923714 + ... + 2924055.

Almost surely, 2^999968499 is an apocalyptic number.

999968499 is a deficient number, since it is larger than the sum of its proper divisors (520451701).

999968499 is a wasteful number, since it uses less digits than its factorization.

999968499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5847794 (or 5847791 counting only the distinct ones).

The product of its digits is 102036672, while the sum is 72.

The square root of 999968499 is about 31622.2785232184. The cubic root of 999968499 is about 999.9894995564.

The spelling of 999968499 in words is "nine hundred ninety-nine million, nine hundred sixty-eight thousand, four hundred ninety-nine".