113603 has 4 divisors (see below), whose sum is σ = 129840. Its totient is φ = 97368.

The previous prime is 113591. The next prime is 113621. The reversal of 113603 is 306311.

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 113603 - 2⁶ = 113539 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (113623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8108 + ... + 8121.

It is an arithmetic number, because the mean of its divisors is an integer number (32460).

2¹¹³⁶⁰³ is an apocalyptic number.

113603 is a deficient number, since it is larger than the sum of its proper divisors (16237).

113603 is an equidigital number, since it uses as much as digits as its factorization.

113603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16236.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 113603 is about 337.0504413289. The cubic root of 113603 is about 48.4317245282.

Adding to 113603 its reverse (306311), we get a palindrome (419914).

The spelling of 113603 in words is "one hundred thirteen thousand, six hundred three".