11995199 has 4 divisors (see below), whose sum is σ = 12250464. Its totient is φ = 11739936.

The previous prime is 11995187. The next prime is 11995201. The reversal of 11995199 is 99159911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99159911 = 503 ⋅197137.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11995199 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 (11995129) 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, 127562 + ... + 127655.

It is an arithmetic number, because the mean of its divisors is an integer number (3062616).

Almost surely, 2^11995199 is an apocalyptic number.

11995199 is a deficient number, since it is larger than the sum of its proper divisors (255265).

11995199 is an equidigital number, since it uses as much as digits as its factorization.

11995199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255264.

The product of its digits is 32805, while the sum is 44.

The square root of 11995199 is about 3463.4085811524. The cubic root of 11995199 is about 228.9123123653.

The spelling of 11995199 in words is "eleven million, nine hundred ninety-five thousand, one hundred ninety-nine".