11388523 has 4 divisors (see below), whose sum is σ = 11630880. Its totient is φ = 11146168.

The previous prime is 11388493. The next prime is 11388527. The reversal of 11388523 is 32588311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32588311 = 7 ⋅4655473.

It is a cyclic number.

It is not a de Polignac number, because 11388523 - 2⁵ = 11388491 is a prime.

It is a super-2 number, since 2×11388523² = 259396912243058, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11388527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121108 + ... + 121201.

It is an arithmetic number, because the mean of its divisors is an integer number (2907720).

Almost surely, 2^11388523 is an apocalyptic number.

11388523 is a deficient number, since it is larger than the sum of its proper divisors (242357).

11388523 is an equidigital number, since it uses as much as digits as its factorization.

11388523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242356.

The product of its digits is 5760, while the sum is 31.

The square root of 11388523 is about 3374.6885782247. The cubic root of 11388523 is about 224.9861588193.

It can be divided in two parts, 11388 and 523, that added together give a palindrome (11911).

The spelling of 11388523 in words is "eleven million, three hundred eighty-eight thousand, five hundred twenty-three".