999099899 has 8 divisors (see below), whose sum is σ = 1178661888. Its totient is φ = 828746280.

The previous prime is 999099887. The next prime is 999099901. The reversal of 999099899 is 998990999.

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

It is a cyclic number.

It is not a de Polignac number, because 999099899 - 2¹² = 999095803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999099839) 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 7 ways as a sum of consecutive naturals, for example, 2301857 + ... + 2302290.

It is an arithmetic number, because the mean of its divisors is an integer number (147332736).

Almost surely, 2^999099899 is an apocalyptic number.

999099899 is a deficient number, since it is larger than the sum of its proper divisors (179561989).

999099899 is a wasteful number, since it uses less digits than its factorization.

999099899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4604185.

The product of its (nonzero) digits is 38263752, while the sum is 71.

The square root of 999099899 is about 31608.5415512959. The cubic root of 999099899 is about 999.6998762681.

Subtracting from 999099899 its reverse (998990999), we obtain a square (108900 = 330²).

The spelling of 999099899 in words is "nine hundred ninety-nine million, ninety-nine thousand, eight hundred ninety-nine".