11868191 has 2 divisors, whose sum is σ = 11868192. Its totient is φ = 11868190.

The previous prime is 11868187. The next prime is 11868203. The reversal of 11868191 is 19186811.

11868191 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 a cyclic number.

It is not a de Polignac number, because 11868191 - 2² = 11868187 is a prime.

It is a super-2 number, since 2×11868191² = 281707915224962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11868151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5934095 + 5934096.

It is an arithmetic number, because the mean of its divisors is an integer number (5934096).

Almost surely, 2^11868191 is an apocalyptic number.

11868191 is a deficient number, since it is larger than the sum of its proper divisors (1).

11868191 is an equidigital number, since it uses as much as digits as its factorization.

11868191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 35.

The square root of 11868191 is about 3445.0240928040. The cubic root of 11868191 is about 228.1015180934.

The spelling of 11868191 in words is "eleven million, eight hundred sixty-eight thousand, one hundred ninety-one".