11689209 has 12 divisors (see below), whose sum is σ = 19296576. Its totient is φ = 6679512.

The previous prime is 11689193. The next prime is 11689211. The reversal of 11689209 is 90298611.

It is not a de Polignac number, because 11689209 - 2⁴ = 11689193 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (11689109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92709 + ... + 92834.

It is an arithmetic number, because the mean of its divisors is an integer number (1608048).

Almost surely, 2^11689209 is an apocalyptic number.

It is an amenable number.

11689209 is a deficient number, since it is larger than the sum of its proper divisors (7607367).

11689209 is a wasteful number, since it uses less digits than its factorization.

11689209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185556 (or 185553 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 11689209 is about 3418.9485225724. The cubic root of 11689209 is about 226.9490528474.

The spelling of 11689209 in words is "eleven million, six hundred eighty-nine thousand, two hundred nine".