11003891 has 8 divisors (see below), whose sum is σ = 11203920. Its totient is φ = 10805632.

The previous prime is 11003857. The next prime is 11003893. The reversal of 11003891 is 19830011.

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 11003891 - 2¹⁰ = 11002867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11003893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19055 + ... + 19623.

It is an arithmetic number, because the mean of its divisors is an integer number (1400490).

Almost surely, 2^11003891 is an apocalyptic number.

11003891 is a deficient number, since it is larger than the sum of its proper divisors (200029).

11003891 is an equidigital number, since it uses as much as digits as its factorization.

11003891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 11003891 is about 3317.2113288122. The cubic root of 11003891 is about 222.4242287127.

The spelling of 11003891 in words is "eleven million, three thousand, eight hundred ninety-one".