11311663 has 4 divisors (see below), whose sum is σ = 12340008. Its totient is φ = 10283320.

The previous prime is 11311661. The next prime is 11311667. The reversal of 11311663 is 36611311.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11311663 - 2¹ = 11311661 is a prime.

It is a Smith number, since the sum of its digits (22) 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11311661) 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 in 3 ways as a sum of consecutive naturals, for example, 514156 + ... + 514177.

It is an arithmetic number, because the mean of its divisors is an integer number (3085002).

Almost surely, 2^11311663 is an apocalyptic number.

11311663 is a deficient number, since it is larger than the sum of its proper divisors (1028345).

11311663 is a wasteful number, since it uses less digits than its factorization.

11311663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028344.

The product of its digits is 324, while the sum is 22.

The square root of 11311663 is about 3363.2815820267. The cubic root of 11311663 is about 224.4788795663.

Adding to 11311663 its reverse (36611311), we get a palindrome (47922974).

The spelling of 11311663 in words is "eleven million, three hundred eleven thousand, six hundred sixty-three".