11568989 has 2 divisors, whose sum is σ = 11568990. Its totient is φ = 11568988.

The previous prime is 11568979. The next prime is 11569013. The reversal of 11568989 is 98986511.

11568989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6416089 + 5152900 = 2533^2 + 2270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11568989 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11568979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5784494 + 5784495.

It is an arithmetic number, because the mean of its divisors is an integer number (5784495).

Almost surely, 2^11568989 is an apocalyptic number.

It is an amenable number.

11568989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11568989 is an equidigital number, since it uses as much as digits as its factorization.

11568989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 47.

The square root of 11568989 is about 3401.3216548865. The cubic root of 11568989 is about 226.1683359617.

The spelling of 11568989 in words is "eleven million, five hundred sixty-eight thousand, nine hundred eighty-nine".