11115899 has 4 divisors (see below), whose sum is σ = 11123136. Its totient is φ = 11108664.

The previous prime is 11115883. The next prime is 11115913. The reversal of 11115899 is 99851111.

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.

It is a cyclic number.

It is not a de Polignac number, because 11115899 - 2⁴ = 11115883 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (11115859) 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, 299 + ... + 4724.

It is an arithmetic number, because the mean of its divisors is an integer number (2780784).

Almost surely, 2^11115899 is an apocalyptic number.

11115899 is a deficient number, since it is larger than the sum of its proper divisors (7237).

11115899 is an equidigital number, since it uses as much as digits as its factorization.

11115899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7236.

The product of its digits is 3240, while the sum is 35.

The square root of 11115899 is about 3334.0514393152. The cubic root of 11115899 is about 223.1763637972.

The spelling of 11115899 in words is "eleven million, one hundred fifteen thousand, eight hundred ninety-nine".