11399609 has 4 divisors (see below), whose sum is σ = 12276516. Its totient is φ = 10522704.

The previous prime is 11399603. The next prime is 11399617. The reversal of 11399609 is 90699311.

11399609 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6017209 + 5382400 = 2453^2 + 2320^2 .

It is a cyclic number.

It is not a de Polignac number, because 11399609 - 2⁴ = 11399593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11399603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438434 + ... + 438459.

It is an arithmetic number, because the mean of its divisors is an integer number (3069129).

Almost surely, 2^11399609 is an apocalyptic number.

It is an amenable number.

11399609 is a deficient number, since it is larger than the sum of its proper divisors (876907).

11399609 is an equidigital number, since it uses as much as digits as its factorization.

11399609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876906.

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 11399609 is about 3376.3307006275. The cubic root of 11399609 is about 225.0591383643.

The spelling of 11399609 in words is "eleven million, three hundred ninety-nine thousand, six hundred nine".