11691011 has 2 divisors, whose sum is σ = 11691012. Its totient is φ = 11691010.

The previous prime is 11690989. The next prime is 11691037. The reversal of 11691011 is 11019611.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11691011 is a prime.

It is not a weakly prime, because it can be changed into another prime (11691041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5845505 + 5845506.

It is an arithmetic number, because the mean of its divisors is an integer number (5845506).

Almost surely, 2^11691011 is an apocalyptic number.

11691011 is a deficient number, since it is larger than the sum of its proper divisors (1).

11691011 is an equidigital number, since it uses as much as digits as its factorization.

11691011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 20.

The square root of 11691011 is about 3419.2120437317. The cubic root of 11691011 is about 226.9607143488.

The spelling of 11691011 in words is "eleven million, six hundred ninety-one thousand, eleven".