11511823 has 2 divisors, whose sum is σ = 11511824. Its totient is φ = 11511822.

The previous prime is 11511821. The next prime is 11511833. The reversal of 11511823 is 32811511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11511823 - 2¹ = 11511821 is a prime.

Together with 11511821, it forms a pair of twin primes.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 11511794 and 11511803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11511821) 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, 5755911 + 5755912.

It is an arithmetic number, because the mean of its divisors is an integer number (5755912).

Almost surely, 2^11511823 is an apocalyptic number.

11511823 is a deficient number, since it is larger than the sum of its proper divisors (1).

11511823 is an equidigital number, since it uses as much as digits as its factorization.

11511823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240, while the sum is 22.

The square root of 11511823 is about 3392.9077499985. The cubic root of 11511823 is about 225.7951978137.

The spelling of 11511823 in words is "eleven million, five hundred eleven thousand, eight hundred twenty-three".