11805047 has 2 divisors, whose sum is σ = 11805048. Its totient is φ = 11805046.

The previous prime is 11805019. The next prime is 11805067. The reversal of 11805047 is 74050811.

11805047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (74050811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11805047 - 2⁸ = 11804791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11805067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5902523 + 5902524.

It is an arithmetic number, because the mean of its divisors is an integer number (5902524).

Almost surely, 2^11805047 is an apocalyptic number.

11805047 is a deficient number, since it is larger than the sum of its proper divisors (1).

11805047 is an equidigital number, since it uses as much as digits as its factorization.

11805047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 11805047 is about 3435.8473481806. The cubic root of 11805047 is about 227.6962650409.

Adding to 11805047 its reverse (74050811), we get a palindrome (85855858).

The spelling of 11805047 in words is "eleven million, eight hundred five thousand, forty-seven".