11566523 has 2 divisors, whose sum is σ = 11566524. Its totient is φ = 11566522.

The previous prime is 11566519. The next prime is 11566531. The reversal of 11566523 is 32566511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11566523 - 2² = 11566519 is a prime.

It is not a weakly prime, because it can be changed into another prime (11566543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5783261 + 5783262.

It is an arithmetic number, because the mean of its divisors is an integer number (5783262).

Almost surely, 2^11566523 is an apocalyptic number.

11566523 is a deficient number, since it is larger than the sum of its proper divisors (1).

11566523 is an equidigital number, since it uses as much as digits as its factorization.

11566523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 29.

The square root of 11566523 is about 3400.9591294222. The cubic root of 11566523 is about 226.1522651034.

The spelling of 11566523 in words is "eleven million, five hundred sixty-six thousand, five hundred twenty-three".