11391305 has 4 divisors (see below), whose sum is σ = 13669572. Its totient is φ = 9113040.

The previous prime is 11391293. The next prime is 11391329. The reversal of 11391305 is 50319311.

11391305 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.

It can be written as a sum of positive squares in 2 ways, for example, as 7689529 + 3701776 = 2773^2 + 1924^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11391305 is a prime.

It is a Duffinian number.

It is a Curzon 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, 1139126 + ... + 1139135.

It is an arithmetic number, because the mean of its divisors is an integer number (3417393).

Almost surely, 2^11391305 is an apocalyptic number.

It is an amenable number.

11391305 is a deficient number, since it is larger than the sum of its proper divisors (2278267).

11391305 is an equidigital number, since it uses as much as digits as its factorization.

11391305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2278266.

The product of its (nonzero) digits is 405, while the sum is 23.

The square root of 11391305 is about 3375.1007392373. The cubic root of 11391305 is about 225.0044772772.

The spelling of 11391305 in words is "eleven million, three hundred ninety-one thousand, three hundred five".