11644691 has 2 divisors, whose sum is σ = 11644692. Its totient is φ = 11644690.

The previous prime is 11644637. The next prime is 11644709. The reversal of 11644691 is 19644611.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11644691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11644621) 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, 5822345 + 5822346.

It is an arithmetic number, because the mean of its divisors is an integer number (5822346).

Almost surely, 2^11644691 is an apocalyptic number.

11644691 is a deficient number, since it is larger than the sum of its proper divisors (1).

11644691 is an equidigital number, since it uses as much as digits as its factorization.

11644691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 11644691 is about 3412.4318308209. The cubic root of 11644691 is about 226.6605767779.

The spelling of 11644691 in words is "eleven million, six hundred forty-four thousand, six hundred ninety-one".