11993843 has 2 divisors, whose sum is σ = 11993844. Its totient is φ = 11993842.

The previous prime is 11993801. The next prime is 11993897. The reversal of 11993843 is 34839911.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (34839911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11993843 - 2¹⁶ = 11928307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11993797 and 11993806.

It is not a weakly prime, because it can be changed into another prime (11993743) 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 as a sum of consecutive naturals, namely, 5996921 + 5996922.

It is an arithmetic number, because the mean of its divisors is an integer number (5996922).

Almost surely, 2^11993843 is an apocalyptic number.

11993843 is a deficient number, since it is larger than the sum of its proper divisors (1).

11993843 is an equidigital number, since it uses as much as digits as its factorization.

11993843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 38.

The square root of 11993843 is about 3463.2128147141. The cubic root of 11993843 is about 228.9036862254.

The spelling of 11993843 in words is "eleven million, nine hundred ninety-three thousand, eight hundred forty-three".