11279609 has 4 divisors (see below), whose sum is σ = 12305040. Its totient is φ = 10254180.

The previous prime is 11279603. The next prime is 11279623. The reversal of 11279609 is 90697211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11279609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11279603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512699 + ... + 512720.

It is an arithmetic number, because the mean of its divisors is an integer number (3076260).

Almost surely, 2^11279609 is an apocalyptic number.

It is an amenable number.

11279609 is a deficient number, since it is larger than the sum of its proper divisors (1025431).

11279609 is a wasteful number, since it uses less digits than its factorization.

11279609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025430.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 11279609 is about 3358.5129149670. The cubic root of 11279609 is about 224.2666427704.

The spelling of 11279609 in words is "eleven million, two hundred seventy-nine thousand, six hundred nine".