11996191 has 2 divisors, whose sum is σ = 11996192. Its totient is φ = 11996190.

The previous prime is 11996167. The next prime is 11996197. The reversal of 11996191 is 19169911.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11996191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11996191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11996197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5998095 + 5998096.

It is an arithmetic number, because the mean of its divisors is an integer number (5998096).

Almost surely, 2^11996191 is an apocalyptic number.

11996191 is a deficient number, since it is larger than the sum of its proper divisors (1).

11996191 is an equidigital number, since it uses as much as digits as its factorization.

11996191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4374, while the sum is 37.

The square root of 11996191 is about 3463.5517897095. The cubic root of 11996191 is about 228.9186225220.

The spelling of 11996191 in words is "eleven million, nine hundred ninety-six thousand, one hundred ninety-one".