11847191 has 2 divisors, whose sum is σ = 11847192. Its totient is φ = 11847190.

The previous prime is 11847179. The next prime is 11847197. The reversal of 11847191 is 19174811.

11847191 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11847191 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11847197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5923595 + 5923596.

It is an arithmetic number, because the mean of its divisors is an integer number (5923596).

Almost surely, 2^11847191 is an apocalyptic number.

11847191 is a deficient number, since it is larger than the sum of its proper divisors (1).

11847191 is an equidigital number, since it uses as much as digits as its factorization.

11847191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 32.

The square root of 11847191 is about 3441.9748691703. The cubic root of 11847191 is about 227.9669016795.

The spelling of 11847191 in words is "eleven million, eight hundred forty-seven thousand, one hundred ninety-one".