238691 has 2 divisors, whose sum is σ = 238692. Its totient is φ = 238690.

The previous prime is 238681. The next prime is 238703. The reversal of 238691 is 196832.

238691 is nontrivially palindromic in base 12.

238691 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 is a cyclic number.

It is not a de Polignac number, because 238691 - 2⁶ = 238627 is a prime.

It is a Sophie Germain prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 238691.

It is not a weakly prime, because it can be changed into another prime (238681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119345 + 119346.

It is an arithmetic number, because the mean of its divisors is an integer number (119346).

2²³⁸⁶⁹¹ is an apocalyptic number.

238691 is a deficient number, since it is larger than the sum of its proper divisors (1).

238691 is an equidigital number, since it uses as much as digits as its factorization.

238691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 29.

The square root of 238691 is about 488.5601293597. The cubic root of 238691 is about 62.0314616597.

It can be divided in two parts, 238 and 691, that added together give a palindrome (929).

The spelling of 238691 in words is "two hundred thirty-eight thousand, six hundred ninety-one".