11065891 has 4 divisors (see below), whose sum is σ = 11153152. Its totient is φ = 10978632.

The previous prime is 11065889. The next prime is 11065897. The reversal of 11065891 is 19856011.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11065891 - 2¹ = 11065889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11065897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43440 + ... + 43693.

It is an arithmetic number, because the mean of its divisors is an integer number (2788288).

Almost surely, 2^11065891 is an apocalyptic number.

11065891 is a deficient number, since it is larger than the sum of its proper divisors (87261).

11065891 is an equidigital number, since it uses as much as digits as its factorization.

11065891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87260.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 11065891 is about 3326.5434011899. The cubic root of 11065891 is about 222.8411867705.

The spelling of 11065891 in words is "eleven million, sixty-five thousand, eight hundred ninety-one".