11681109 has 12 divisors (see below), whose sum is σ = 18406752. Its totient is φ = 7079400.

The previous prime is 11681093. The next prime is 11681129. The reversal of 11681109 is 90118611.

11681109 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11681109 - 2⁴ = 11681093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11681129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58897 + ... + 59094.

It is an arithmetic number, because the mean of its divisors is an integer number (1533896).

Almost surely, 2^11681109 is an apocalyptic number.

It is an amenable number.

11681109 is a deficient number, since it is larger than the sum of its proper divisors (6725643).

11681109 is a wasteful number, since it uses less digits than its factorization.

11681109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118008 (or 118005 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 27.

The square root of 11681109 is about 3417.7637425662. The cubic root of 11681109 is about 226.8966195275.

It can be divided in two parts, 116 and 81109, that added together give a square (81225 = 285²).

The spelling of 11681109 in words is "eleven million, six hundred eighty-one thousand, one hundred nine".