11321609 has 8 divisors (see below), whose sum is σ = 12909960. Its totient is φ = 9835776.

The previous prime is 11321591. The next prime is 11321659. The reversal of 11321609 is 90612311.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 299209 + 11022400 = 547^2 + 3320^2 .

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 11321609 - 2⁸ = 11321353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11321659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25394 + ... + 25835.

It is an arithmetic number, because the mean of its divisors is an integer number (1613745).

Almost surely, 2^11321609 is an apocalyptic number.

It is an amenable number.

11321609 is a deficient number, since it is larger than the sum of its proper divisors (1588351).

11321609 is a wasteful number, since it uses less digits than its factorization.

11321609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51259.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 11321609 is about 3364.7598725615. The cubic root of 11321609 is about 224.5446527682.

The spelling of 11321609 in words is "eleven million, three hundred twenty-one thousand, six hundred nine".