168813 has 6 divisors (see below), whose sum is σ = 243854. Its totient is φ = 112536.

The previous prime is 168803. The next prime is 168851. The reversal of 168813 is 318861.

It can be written as a sum of positive squares in only one way, i.e., 149769 + 19044 = 387^2 + 138^2 .

It is not a de Polignac number, because 168813 - 2⁵ = 168781 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9370 + ... + 9387.

2¹⁶⁸⁸¹³ is an apocalyptic number.

It is an amenable number.

168813 is a deficient number, since it is larger than the sum of its proper divisors (75041).

168813 is a wasteful number, since it uses less digits than its factorization.

168813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18763 (or 18760 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 168813 is about 410.8685921314. The cubic root of 168813 is about 55.2673484828.

The spelling of 168813 in words is "one hundred sixty-eight thousand, eight hundred thirteen".