113818 has 4 divisors (see below), whose sum is σ = 170730. Its totient is φ = 56908.

The previous prime is 113809. The next prime is 113819. The reversal of 113818 is 818311.

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

It can be written as a sum of positive squares in only one way, i.e., 106929 + 6889 = 327^2 + 83^2 .

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (113819) by changing a digit.

113818 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28453 + ... + 28456.

2¹¹³⁸¹⁸ is an apocalyptic number.

113818 is a deficient number, since it is larger than the sum of its proper divisors (56912).

113818 is an equidigital number, since it uses as much as digits as its factorization.

113818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56911.

The product of its digits is 192, while the sum is 22.

The square root of 113818 is about 337.3692339263. The cubic root of 113818 is about 48.4622585185.

It can be divided in two parts, 1138 and 18, that added together give a square (1156 = 34²).

The spelling of 113818 in words is "one hundred thirteen thousand, eight hundred eighteen".