9999090899 has 8 divisors (see below), whose sum is σ = 11428862208. Its totient is φ = 8569652040.

The previous prime is 9999090883. The next prime is 9999090901. The reversal of 9999090899 is 9980909999.

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 9999090899 - 2⁴ = 9999090883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9999090809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14927 + ... + 142200.

It is an arithmetic number, because the mean of its divisors is an integer number (1428607776).

Almost surely, 2^9999090899 is an apocalyptic number.

9999090899 is a deficient number, since it is larger than the sum of its proper divisors (1429771309).

9999090899 is a wasteful number, since it uses less digits than its factorization.

9999090899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166225.

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

The square root of 9999090899 is about 99995.4543916872. The cubic root of 9999090899 is about 2154.3694014290.

The spelling of 9999090899 in words is "nine billion, nine hundred ninety-nine million, ninety thousand, eight hundred ninety-nine".