238981 has 4 divisors (see below), whose sum is σ = 240012. Its totient is φ = 237952.

The previous prime is 238967. The next prime is 238991. The reversal of 238981 is 189832.

238981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 188356 + 50625 = 434^2 + 225^2 .

It is a cyclic number.

It is not a de Polignac number, because 238981 - 2⁵ = 238949 is a prime.

It is a super-2 number, since 2×238981² = 114223836722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15 + ... + 691.

It is an arithmetic number, because the mean of its divisors is an integer number (60003).

2²³⁸⁹⁸¹ is an apocalyptic number.

It is an amenable number.

238981 is a deficient number, since it is larger than the sum of its proper divisors (1031).

238981 is an equidigital number, since it uses as much as digits as its factorization.

238981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030.

The product of its digits is 3456, while the sum is 31.

The square root of 238981 is about 488.8568297569. The cubic root of 238981 is about 62.0565734059.

It can be divided in two parts, 2 and 38981, that added together give a palindrome (38983).

The spelling of 238981 in words is "two hundred thirty-eight thousand, nine hundred eighty-one".