11199999 has 4 divisors (see below), whose sum is σ = 14933336. Its totient is φ = 7466664.

The previous prime is 11199989. The next prime is 11200001. The reversal of 11199999 is 99999111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99999111 = 3 ⋅33333037.

It is not a de Polignac number, because 11199999 - 2⁵ = 11199967 is a prime.

It is a Duffinian number.

11199999 is a modest number, since divided by 9999 gives 1119 as remainder.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11199989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1866664 + ... + 1866669.

It is an arithmetic number, because the mean of its divisors is an integer number (3733334).

Almost surely, 2^11199999 is an apocalyptic number.

11199999 is a deficient number, since it is larger than the sum of its proper divisors (3733337).

11199999 is an equidigital number, since it uses as much as digits as its factorization.

11199999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3733336.

The product of its digits is 59049, while the sum is 48.

The square root of 11199999 is about 3346.6399567327. The cubic root of 11199999 is about 223.7377817574.

The spelling of 11199999 in words is "eleven million, one hundred ninety-nine thousand, nine hundred ninety-nine".