1099109909 has 4 divisors (see below), whose sum is σ = 1101660480. Its totient is φ = 1096559340.

The previous prime is 1099109903. The next prime is 1099109923. The reversal of 1099109909 is 9099019901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9099019901 = 31 ⋅293516771.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1099109909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099109903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1274639 + ... + 1275500.

It is an arithmetic number, because the mean of its divisors is an integer number (275415120).

Almost surely, 2^1099109909 is an apocalyptic number.

It is an amenable number.

1099109909 is a deficient number, since it is larger than the sum of its proper divisors (2550571).

1099109909 is an equidigital number, since it uses as much as digits as its factorization.

1099109909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550570.

The product of its (nonzero) digits is 59049, while the sum is 47.

The square root of 1099109909 is about 33152.8265612451. The cubic root of 1099109909 is about 1032.0016090379.

The spelling of 1099109909 in words is "one billion, ninety-nine million, one hundred nine thousand, nine hundred nine".