11965843 has 4 divisors (see below), whose sum is σ = 12134448. Its totient is φ = 11797240.

The previous prime is 11965831. The next prime is 11965847. The reversal of 11965843 is 34856911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34856911 = 149 ⋅233939.

It is a cyclic number.

It is not a de Polignac number, because 11965843 - 2¹³ = 11957651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11965847) 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, 84196 + ... + 84337.

It is an arithmetic number, because the mean of its divisors is an integer number (3033612).

Almost surely, 2^11965843 is an apocalyptic number.

11965843 is a deficient number, since it is larger than the sum of its proper divisors (168605).

11965843 is an equidigital number, since it uses as much as digits as its factorization.

11965843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168604.

The product of its digits is 25920, while the sum is 37.

The square root of 11965843 is about 3459.1679635427. The cubic root of 11965843 is about 228.7254198359.

The spelling of 11965843 in words is "eleven million, nine hundred sixty-five thousand, eight hundred forty-three".