11343991 has 4 divisors (see below), whose sum is σ = 11837232. Its totient is φ = 10850752.

The previous prime is 11343953. The next prime is 11344001. The reversal of 11343991 is 19934311.

11343991 is nontrivially palindromic in base 14.

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 11343991 - 2⁷ = 11343863 is a prime.

It is a super-2 number, since 2×11343991² = 257372263616162, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11343911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246586 + ... + 246631.

It is an arithmetic number, because the mean of its divisors is an integer number (2959308).

Almost surely, 2^11343991 is an apocalyptic number.

11343991 is a deficient number, since it is larger than the sum of its proper divisors (493241).

11343991 is an equidigital number, since it uses as much as digits as its factorization.

11343991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493240.

The product of its digits is 2916, while the sum is 31.

The square root of 11343991 is about 3368.0841735325. The cubic root of 11343991 is about 224.6925248653.

The spelling of 11343991 in words is "eleven million, three hundred forty-three thousand, nine hundred ninety-one".