999911109 has 8 divisors (see below), whose sum is σ = 1340921952. Its totient is φ = 662753840.

The previous prime is 999911093. The next prime is 999911111. The reversal of 999911109 is 901119999.

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 999911109 - 2⁴ = 999911093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999911509) 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, 962787 + ... + 963824.

It is an arithmetic number, because the mean of its divisors is an integer number (167615244).

Almost surely, 2^999911109 is an apocalyptic number.

It is an amenable number.

999911109 is a deficient number, since it is larger than the sum of its proper divisors (341010843).

999911109 is a wasteful number, since it uses less digits than its factorization.

999911109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926787.

The product of its (nonzero) digits is 59049, while the sum is 48.

The square root of 999911109 is about 31621.3710803311. The cubic root of 999911109 is about 999.9703687887.

The spelling of 999911109 in words is "nine hundred ninety-nine million, nine hundred eleven thousand, one hundred nine".