99996999 has 8 divisors (see below), whose sum is σ = 133726320. Its totient is φ = 66466176.

The previous prime is 99996983. The next prime is 99997033. The reversal of 99996999 is 99969999.

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

It is not a de Polignac number, because 99996999 - 2⁴ = 99996983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99996899) 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, 48444 + ... + 50465.

It is an arithmetic number, because the mean of its divisors is an integer number (16715790).

Almost surely, 2^99996999 is an apocalyptic number.

99996999 is a deficient number, since it is larger than the sum of its proper divisors (33729321).

99996999 is a wasteful number, since it uses less digits than its factorization.

99996999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99249.

The product of its digits is 28697814, while the sum is 69.

The square root of 99996999 is about 9999.8499488742. The cubic root of 99996999 is about 464.1542401788.

Subtracting from 99996999 its reverse (99969999), we obtain a cube (27000 = 30³).

The spelling of 99996999 in words is "ninety-nine million, nine hundred ninety-six thousand, nine hundred ninety-nine".