11085391 has 4 divisors (see below), whose sum is σ = 11093112. Its totient is φ = 11077672.

The previous prime is 11085367. The next prime is 11085401. The reversal of 11085391 is 19358011.

11085391 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 brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 19358011 = 257 ⋅75323.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11085391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11085331) 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, 1000 + ... + 4813.

It is an arithmetic number, because the mean of its divisors is an integer number (2773278).

Almost surely, 2^11085391 is an apocalyptic number.

11085391 is a deficient number, since it is larger than the sum of its proper divisors (7721).

11085391 is an equidigital number, since it uses as much as digits as its factorization.

11085391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7720.

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 11085391 is about 3329.4730814350. The cubic root of 11085391 is about 222.9720047706.

It can be divided in two parts, 11085 and 391, that added together give a triangular number (11476 = T₁₅₁).

The spelling of 11085391 in words is "eleven million, eighty-five thousand, three hundred ninety-one".