11811847 has 2 divisors, whose sum is σ = 11811848. Its totient is φ = 11811846.

The previous prime is 11811797. The next prime is 11811851. The reversal of 11811847 is 74811811.

11811847 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11811847 - 2¹¹ = 11809799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11811887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5905923 + 5905924.

It is an arithmetic number, because the mean of its divisors is an integer number (5905924).

Almost surely, 2^11811847 is an apocalyptic number.

11811847 is a deficient number, since it is larger than the sum of its proper divisors (1).

11811847 is an equidigital number, since it uses as much as digits as its factorization.

11811847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1792, while the sum is 31.

The square root of 11811847 is about 3436.8367723824. The cubic root of 11811847 is about 227.7399762153.

The spelling of 11811847 in words is "eleven million, eight hundred eleven thousand, eight hundred forty-seven".