118813 has 8 divisors (see below), whose sum is σ = 130680. Its totient is φ = 107520.

The previous prime is 118801. The next prime is 118819. The reversal of 118813 is 318811.

118813 is nontrivially palindromic in base 4.

It can be written as a sum of positive squares in 4 ways, for example, as 47524 + 71289 = 218^2 + 267^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373 + ... + 613.

It is an arithmetic number, because the mean of its divisors is an integer number (16335).

2¹¹⁸⁸¹³ is an apocalyptic number.

It is an amenable number.

118813 is a deficient number, since it is larger than the sum of its proper divisors (11867).

118813 is a wasteful number, since it uses less digits than its factorization.

118813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287.

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

The square root of 118813 is about 344.6926166891. The cubic root of 118813 is about 49.1610692980.

The spelling of 118813 in words is "one hundred eighteen thousand, eight hundred thirteen".