11191771 has 2 divisors, whose sum is σ = 11191772. Its totient is φ = 11191770.

The previous prime is 11191759. The next prime is 11191783. The reversal of 11191771 is 17719111.

It is a balanced prime because it is at equal distance from previous prime (11191759) and next prime (11191783).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11191771 is a prime.

It is not a weakly prime, because it can be changed into another prime (11191571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5595885 + 5595886.

It is an arithmetic number, because the mean of its divisors is an integer number (5595886).

Almost surely, 2^11191771 is an apocalyptic number.

11191771 is a deficient number, since it is larger than the sum of its proper divisors (1).

11191771 is an equidigital number, since it uses as much as digits as its factorization.

11191771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 441, while the sum is 28.

The square root of 11191771 is about 3345.4104381974. The cubic root of 11191771 is about 223.6829792092.

The spelling of 11191771 in words is "eleven million, one hundred ninety-one thousand, seven hundred seventy-one".