11530823 has 4 divisors (see below), whose sum is σ = 11547288. Its totient is φ = 11514360.

The previous prime is 11530817. The next prime is 11530829. The reversal of 11530823 is 32803511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32803511 = 13 ⋅2523347.

It is an interprime number because it is at equal distance from previous prime (11530817) and next prime (11530829).

It is a cyclic number.

It is not a de Polignac number, because 11530823 - 2¹⁶ = 11465287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11530829) 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, 7133 + ... + 8598.

It is an arithmetic number, because the mean of its divisors is an integer number (2886822).

Almost surely, 2^11530823 is an apocalyptic number.

11530823 is a deficient number, since it is larger than the sum of its proper divisors (16465).

11530823 is an equidigital number, since it uses as much as digits as its factorization.

11530823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16464.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 11530823 is about 3395.7065538706. The cubic root of 11530823 is about 225.9193528000.

The spelling of 11530823 in words is "eleven million, five hundred thirty thousand, eight hundred twenty-three".