11199679 has 4 divisors (see below), whose sum is σ = 11210776. Its totient is φ = 11188584.

The previous prime is 11199673. The next prime is 11199691. The reversal of 11199679 is 97699111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 97699111 = 6997 ⋅13963.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11199679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11199673) 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, 3864 + ... + 6109.

It is an arithmetic number, because the mean of its divisors is an integer number (2802694).

Almost surely, 2^11199679 is an apocalyptic number.

11199679 is a deficient number, since it is larger than the sum of its proper divisors (11097).

11199679 is an equidigital number, since it uses as much as digits as its factorization.

11199679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11096.

The product of its digits is 30618, while the sum is 43.

The square root of 11199679 is about 3346.5921472447. The cubic root of 11199679 is about 223.7356509009.

The spelling of 11199679 in words is "eleven million, one hundred ninety-nine thousand, six hundred seventy-nine".