11511893 has 2 divisors, whose sum is σ = 11511894. Its totient is φ = 11511892.

The previous prime is 11511833. The next prime is 11511901. The reversal of 11511893 is 39811511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11303044 + 208849 = 3362^2 + 457^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11511893 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 (11511823) 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, 5755946 + 5755947.

It is an arithmetic number, because the mean of its divisors is an integer number (5755947).

Almost surely, 2^11511893 is an apocalyptic number.

It is an amenable number.

11511893 is a deficient number, since it is larger than the sum of its proper divisors (1).

11511893 is an equidigital number, since it uses as much as digits as its factorization.

11511893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 29.

The square root of 11511893 is about 3392.9180656184. The cubic root of 11511893 is about 225.7956554775.

The spelling of 11511893 in words is "eleven million, five hundred eleven thousand, eight hundred ninety-three".