1109818999 has 4 divisors (see below), whose sum is σ = 1109975400. Its totient is φ = 1109662600.

The previous prime is 1109818987. The next prime is 1109819063. The reversal of 1109818999 is 9998189011.

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 1109818999 - 2⁵ = 1109818967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109818909) 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, 67024 + ... + 81925.

It is an arithmetic number, because the mean of its divisors is an integer number (277493850).

Almost surely, 2^1109818999 is an apocalyptic number.

1109818999 is a deficient number, since it is larger than the sum of its proper divisors (156401).

1109818999 is an equidigital number, since it uses as much as digits as its factorization.

1109818999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156400.

The product of its (nonzero) digits is 419904, while the sum is 55.

The square root of 1109818999 is about 33313.9460136442. The cubic root of 1109818999 is about 1035.3425236446.

The spelling of 1109818999 in words is "one billion, one hundred nine million, eight hundred eighteen thousand, nine hundred ninety-nine".