11838111 has 4 divisors (see below), whose sum is σ = 15784152. Its totient is φ = 7892072.

The previous prime is 11838107. The next prime is 11838131. The reversal of 11838111 is 11183811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11183811 = 3 ⋅3727937.

It is a cyclic number.

It is not a de Polignac number, because 11838111 - 2² = 11838107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11838131) 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, 1973016 + ... + 1973021.

It is an arithmetic number, because the mean of its divisors is an integer number (3946038).

Almost surely, 2^11838111 is an apocalyptic number.

11838111 is a deficient number, since it is larger than the sum of its proper divisors (3946041).

11838111 is an equidigital number, since it uses as much as digits as its factorization.

11838111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3946040.

The product of its digits is 192, while the sum is 24.

The square root of 11838111 is about 3440.6556061309. The cubic root of 11838111 is about 227.9086468433.

The spelling of 11838111 in words is "eleven million, eight hundred thirty-eight thousand, one hundred eleven".