238813 has 4 divisors (see below), whose sum is σ = 240768. Its totient is φ = 236860.

The previous prime is 238801. The next prime is 238829. The reversal of 238813 is 318832.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 238813 - 2⁵ = 238781 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 (238853) 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, 781 + ... + 1042.

It is an arithmetic number, because the mean of its divisors is an integer number (60192).

2²³⁸⁸¹³ is an apocalyptic number.

It is an amenable number.

238813 is a deficient number, since it is larger than the sum of its proper divisors (1955).

238813 is a wasteful number, since it uses less digits than its factorization.

238813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1954.

The product of its digits is 1152, while the sum is 25.

The square root of 238813 is about 488.6849700983. The cubic root of 238813 is about 62.0420283887.

It can be divided in two parts, 2388 and 13, that added together give a 4-th power (2401 = 7⁴).

The spelling of 238813 in words is "two hundred thirty-eight thousand, eight hundred thirteen".