11091385 has 4 divisors (see below), whose sum is σ = 13309668. Its totient is φ = 8873104.

The previous prime is 11091371. The next prime is 11091413. The reversal of 11091385 is 58319011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58319011 = 67 ⋅870433.

It can be written as a sum of positive squares in 2 ways, for example, as 8667136 + 2424249 = 2944^2 + 1557^2 .

It is a cyclic number.

It is not a de Polignac number, because 11091385 - 2⁹ = 11090873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1109134 + ... + 1109143.

It is an arithmetic number, because the mean of its divisors is an integer number (3327417).

Almost surely, 2^11091385 is an apocalyptic number.

It is an amenable number.

11091385 is a deficient number, since it is larger than the sum of its proper divisors (2218283).

11091385 is an equidigital number, since it uses as much as digits as its factorization.

11091385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218282.

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

The square root of 11091385 is about 3330.3731022214. The cubic root of 11091385 is about 223.0121853825.

It can be divided in two parts, 11091 and 385, that added together give a triangular number (11476 = T₁₅₁).

The spelling of 11091385 in words is "eleven million, ninety-one thousand, three hundred eighty-five".