11712191 has 2 divisors, whose sum is σ = 11712192. Its totient is φ = 11712190.

The previous prime is 11712163. The next prime is 11712223. The reversal of 11712191 is 19121711.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11712191 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 (11712121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5856095 + 5856096.

It is an arithmetic number, because the mean of its divisors is an integer number (5856096).

Almost surely, 2^11712191 is an apocalyptic number.

11712191 is a deficient number, since it is larger than the sum of its proper divisors (1).

11712191 is an equidigital number, since it uses as much as digits as its factorization.

11712191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 126, while the sum is 23.

The square root of 11712191 is about 3422.3078470529. The cubic root of 11712191 is about 227.0976893280.

The spelling of 11712191 in words is "eleven million, seven hundred twelve thousand, one hundred ninety-one".