11915843 has 2 divisors, whose sum is σ = 11915844. Its totient is φ = 11915842.

The previous prime is 11915837. The next prime is 11915867. The reversal of 11915843 is 34851911.

11915843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (34851911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11915843 - 2⁶ = 11915779 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11995843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5957921 + 5957922.

It is an arithmetic number, because the mean of its divisors is an integer number (5957922).

Almost surely, 2^11915843 is an apocalyptic number.

11915843 is a deficient number, since it is larger than the sum of its proper divisors (1).

11915843 is an equidigital number, since it uses as much as digits as its factorization.

11915843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 32.

The square root of 11915843 is about 3451.9332264689. The cubic root of 11915843 is about 228.4063940577.

The spelling of 11915843 in words is "eleven million, nine hundred fifteen thousand, eight hundred forty-three".