1109999999 has 8 divisors (see below), whose sum is σ = 1121700528. Its totient is φ = 1098313600.

The previous prime is 1109999993. The next prime is 1110000019. The reversal of 1109999999 is 9999999011.

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 1109999999 - 2⁸ = 1109999743 is a prime.

It is a Duffinian number.

1109999999 is a modest number, since divided by 99999 gives 11099 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109999993) 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, 241844 + ... + 246390.

It is an arithmetic number, because the mean of its divisors is an integer number (140212566).

Almost surely, 2^1109999999 is an apocalyptic number.

1109999999 is a deficient number, since it is larger than the sum of its proper divisors (11700529).

1109999999 is a wasteful number, since it uses less digits than its factorization.

1109999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7065.

The product of its (nonzero) digits is 4782969, while the sum is 65.

The square root of 1109999999 is about 33316.6624829079. The cubic root of 1109999999 is about 1035.3988051375.

The spelling of 1109999999 in words is "one billion, one hundred nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".