113663 has 4 divisors (see below), whose sum is σ = 124008. Its totient is φ = 103320.

The previous prime is 113657. The next prime is 113683. The reversal of 113663 is 366311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366311 = 11 ⋅33301.

It is a cyclic number.

It is not a de Polignac number, because 113663 - 2⁴ = 113647 is a prime.

It is a Duffinian number.

It is a plaindrome in base 8 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113623) 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, 5156 + ... + 5177.

It is an arithmetic number, because the mean of its divisors is an integer number (31002).

2¹¹³⁶⁶³ is an apocalyptic number.

113663 is a deficient number, since it is larger than the sum of its proper divisors (10345).

113663 is a wasteful number, since it uses less digits than its factorization.

113663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10344.

The product of its digits is 324, while the sum is 20.

The square root of 113663 is about 337.1394370287. The cubic root of 113663 is about 48.4402495144.

Adding to 113663 its reverse (366311), we get a palindrome (479974).

The spelling of 113663 in words is "one hundred thirteen thousand, six hundred sixty-three".