11816609 has 8 divisors (see below), whose sum is σ = 13527360. Its totient is φ = 10111536.

The previous prime is 11816591. The next prime is 11816647. The reversal of 11816609 is 90661811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11816609 - 2⁸ = 11816353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11816669) 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 7 ways as a sum of consecutive naturals, for example, 4982 + ... + 6960.

It is an arithmetic number, because the mean of its divisors is an integer number (1690920).

Almost surely, 2^11816609 is an apocalyptic number.

It is an amenable number.

11816609 is a deficient number, since it is larger than the sum of its proper divisors (1710751).

11816609 is an equidigital number, since it uses as much as digits as its factorization.

11816609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2839.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 11816609 is about 3437.5294907826. The cubic root of 11816609 is about 227.7705769068.

The spelling of 11816609 in words is "eleven million, eight hundred sixteen thousand, six hundred nine".