11199813 has 4 divisors (see below), whose sum is σ = 14933088. Its totient is φ = 7466540.

The previous prime is 11199809. The next prime is 11199833. The reversal of 11199813 is 31899111.

It is a happy number.

11199813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31899111 = 3 ⋅10633037.

It is a cyclic number.

It is not a de Polignac number, because 11199813 - 2² = 11199809 is a prime.

It is a super-2 number, since 2×11199813² = 250871622469938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11199833) 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, 1866633 + ... + 1866638.

It is an arithmetic number, because the mean of its divisors is an integer number (3733272).

Almost surely, 2^11199813 is an apocalyptic number.

It is an amenable number.

11199813 is a deficient number, since it is larger than the sum of its proper divisors (3733275).

11199813 is an equidigital number, since it uses as much as digits as its factorization.

11199813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3733274.

The product of its digits is 1944, while the sum is 33.

The square root of 11199813 is about 3346.6121675509. The cubic root of 11199813 is about 223.7365432020.

The spelling of 11199813 in words is "eleven million, one hundred ninety-nine thousand, eight hundred thirteen".