11005391 has 6 divisors (see below), whose sum is σ = 11312280. Its totient is φ = 10706616.

The previous prime is 11005387. The next prime is 11005399. The reversal of 11005391 is 19350011.

It is not a de Polignac number, because 11005391 - 2² = 11005387 is a prime.

It is a super-2 number, since 2×11005391² = 242237262125762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11005399) 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 5 ways as a sum of consecutive naturals, for example, 2651 + ... + 5388.

It is an arithmetic number, because the mean of its divisors is an integer number (1885380).

Almost surely, 2^11005391 is an apocalyptic number.

11005391 is a deficient number, since it is larger than the sum of its proper divisors (306889).

11005391 is an frugal number, since it uses more digits than its factorization.

11005391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8113 (or 8076 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 20.

The square root of 11005391 is about 3317.4374146320. The cubic root of 11005391 is about 222.4343348707.

The spelling of 11005391 in words is "eleven million, five thousand, three hundred ninety-one".