999119911 has 4 divisors (see below), whose sum is σ = 999407512. Its totient is φ = 998832312.

The previous prime is 999119909. The next prime is 999119923. The reversal of 999119911 is 119911999.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 999119911 - 2¹ = 999119909 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999119951) 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 3 ways as a sum of consecutive naturals, for example, 138525 + ... + 145558.

It is an arithmetic number, because the mean of its divisors is an integer number (249851878).

Almost surely, 2^999119911 is an apocalyptic number.

999119911 is a deficient number, since it is larger than the sum of its proper divisors (287601).

999119911 is a wasteful number, since it uses less digits than its factorization.

999119911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287600.

The product of its digits is 59049, while the sum is 49.

The square root of 999119911 is about 31608.8581097135. The cubic root of 999119911 is about 999.7065508960.

The spelling of 999119911 in words is "nine hundred ninety-nine million, one hundred nineteen thousand, nine hundred eleven".