238681 has 2 divisors, whose sum is σ = 238682. Its totient is φ = 238680.

The previous prime is 238673. The next prime is 238691. The reversal of 238681 is 186832.

238681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230400 + 8281 = 480^2 + 91^2 .

It is a cyclic number.

It is not a de Polignac number, because 238681 - 2³ = 238673 is a prime.

It is a super-2 number, since 2×238681² = 113937239522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (238691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119340 + 119341.

It is an arithmetic number, because the mean of its divisors is an integer number (119341).

2²³⁸⁶⁸¹ is an apocalyptic number.

It is an amenable number.

238681 is a deficient number, since it is larger than the sum of its proper divisors (1).

238681 is an equidigital number, since it uses as much as digits as its factorization.

238681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 28.

The square root of 238681 is about 488.5498950977. The cubic root of 238681 is about 62.0305953747.

It can be divided in two parts, 238 and 681, that added together give a palindrome (919).

The spelling of 238681 in words is "two hundred thirty-eight thousand, six hundred eighty-one".