11239891 has 8 divisors (see below), whose sum is σ = 12194784. Its totient is φ = 10297920.

The previous prime is 11239867. The next prime is 11239903. The reversal of 11239891 is 19893211.

11239891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11239891 - 2⁵ = 11239859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11239841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1375 + ... + 4936.

It is an arithmetic number, because the mean of its divisors is an integer number (1524348).

Almost surely, 2^11239891 is an apocalyptic number.

11239891 is a deficient number, since it is larger than the sum of its proper divisors (954893).

11239891 is a wasteful number, since it uses less digits than its factorization.

11239891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6461.

The product of its digits is 3888, while the sum is 34.

The square root of 11239891 is about 3352.5946668215. The cubic root of 11239891 is about 224.0031023699.

The spelling of 11239891 in words is "eleven million, two hundred thirty-nine thousand, eight hundred ninety-one".