11663243 has 4 divisors (see below), whose sum is σ = 11803848. Its totient is φ = 11522640.

The previous prime is 11663227. The next prime is 11663257. The reversal of 11663243 is 34236611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34236611 = 727 ⋅47093.

It is a cyclic number.

It is not a de Polignac number, because 11663243 - 2⁴ = 11663227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11663203) 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, 70178 + ... + 70343.

It is an arithmetic number, because the mean of its divisors is an integer number (2950962).

Almost surely, 2^11663243 is an apocalyptic number.

11663243 is a deficient number, since it is larger than the sum of its proper divisors (140605).

11663243 is an equidigital number, since it uses as much as digits as its factorization.

11663243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140604.

The product of its digits is 2592, while the sum is 26.

The square root of 11663243 is about 3415.1490450638. The cubic root of 11663243 is about 226.7808827009.

Adding to 11663243 its reverse (34236611), we get a palindrome (45899854).

The spelling of 11663243 in words is "eleven million, six hundred sixty-three thousand, two hundred forty-three".