1090109909 has 16 divisors (see below), whose sum is σ = 1326547200. Its totient is φ = 893748240.

The previous prime is 1090109893. The next prime is 1090109929. The reversal of 1090109909 is 9099010901.

It is a happy number.

It is not a de Polignac number, because 1090109909 - 2⁴ = 1090109893 is a prime.

It is a super-2 number, since 2×1090109909² = 2376679227399976562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090109929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61202 + ... + 76979.

It is an arithmetic number, because the mean of its divisors is an integer number (82909200).

Almost surely, 2^1090109909 is an apocalyptic number.

It is an amenable number.

1090109909 is a deficient number, since it is larger than the sum of its proper divisors (236437291).

1090109909 is an equidigital number, since it uses as much as digits as its factorization.

1090109909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138225 (or 138211 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 38.

The square root of 1090109909 is about 33016.8125202903. The cubic root of 1090109909 is about 1029.1770562405.

The spelling of 1090109909 in words is "one billion, ninety million, one hundred nine thousand, nine hundred nine".