11984609 has 32 divisors (see below), whose sum is σ = 15998976. Its totient is φ = 8709120.

The previous prime is 11984597. The next prime is 11984639. The reversal of 11984609 is 90648911.

It is a happy number.

It is not a de Polignac number, because 11984609 - 2²⁰ = 10936033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11984639) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94304 + ... + 94430.

It is an arithmetic number, because the mean of its divisors is an integer number (499968).

Almost surely, 2^11984609 is an apocalyptic number.

It is an amenable number.

11984609 is a deficient number, since it is larger than the sum of its proper divisors (4014367).

11984609 is a wasteful number, since it uses less digits than its factorization.

11984609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 11984609 is about 3461.8794028678. The cubic root of 11984609 is about 228.8449272074.

The spelling of 11984609 in words is "eleven million, nine hundred eighty-four thousand, six hundred nine".