11959943 has 4 divisors (see below), whose sum is σ = 11966880. Its totient is φ = 11953008.

The previous prime is 11959939. The next prime is 11959951. The reversal of 11959943 is 34995911.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11959943 - 2² = 11959939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11959943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11959903) 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, 1346 + ... + 5072.

It is an arithmetic number, because the mean of its divisors is an integer number (2991720).

Almost surely, 2^11959943 is an apocalyptic number.

11959943 is a deficient number, since it is larger than the sum of its proper divisors (6937).

11959943 is an equidigital number, since it uses as much as digits as its factorization.

11959943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6936.

The product of its digits is 43740, while the sum is 41.

The square root of 11959943 is about 3458.3150521605. The cubic root of 11959943 is about 228.6878210966.

The spelling of 11959943 in words is "eleven million, nine hundred fifty-nine thousand, nine hundred forty-three".