11391943 has 4 divisors (see below), whose sum is σ = 11562040. Its totient is φ = 11221848.

The previous prime is 11391937. The next prime is 11391953. The reversal of 11391943 is 34919311.

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 11391943 - 2¹³ = 11383751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11391953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84948 + ... + 85081.

It is an arithmetic number, because the mean of its divisors is an integer number (2890510).

Almost surely, 2^11391943 is an apocalyptic number.

11391943 is a deficient number, since it is larger than the sum of its proper divisors (170097).

11391943 is an equidigital number, since it uses as much as digits as its factorization.

11391943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170096.

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

The square root of 11391943 is about 3375.1952536113. The cubic root of 11391943 is about 225.0086778546.

The spelling of 11391943 in words is "eleven million, three hundred ninety-one thousand, nine hundred forty-three".