11568961 has 2 divisors, whose sum is σ = 11568962. Its totient is φ = 11568960.

The previous prime is 11568937. The next prime is 11568979. The reversal of 11568961 is 16986511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6864400 + 4704561 = 2620^2 + 2169^2 .

It is an emirp because it is prime and its reverse (16986511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11568961 - 2¹¹ = 11566913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11568961.

It is not a weakly prime, because it can be changed into another prime (11568761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5784480 + 5784481.

It is an arithmetic number, because the mean of its divisors is an integer number (5784481).

Almost surely, 2^11568961 is an apocalyptic number.

It is an amenable number.

11568961 is a deficient number, since it is larger than the sum of its proper divisors (1).

11568961 is an equidigital number, since it uses as much as digits as its factorization.

11568961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 37.

The square root of 11568961 is about 3401.3175388370. The cubic root of 11568961 is about 226.1681534993.

The spelling of 11568961 in words is "eleven million, five hundred sixty-eight thousand, nine hundred sixty-one".