238318681 has 2 divisors, whose sum is σ = 238318682. Its totient is φ = 238318680.

The previous prime is 238318673. The next prime is 238318741. The reversal of 238318681 is 186813832.

238318681 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., 236667456 + 1651225 = 15384^2 + 1285^2 .

It is a cyclic number.

It is not a de Polignac number, because 238318681 - 2³ = 238318673 is a prime.

It is a super-2 number, since 2×238318681² = 113591587427159522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (238318651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119159340 + 119159341.

It is an arithmetic number, because the mean of its divisors is an integer number (119159341).

Almost surely, 2^238318681 is an apocalyptic number.

It is an amenable number.

238318681 is a deficient number, since it is larger than the sum of its proper divisors (1).

238318681 is an equidigital number, since it uses as much as digits as its factorization.

238318681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 40.

The square root of 238318681 is about 15437.5736759375. The cubic root of 238318681 is about 619.9919189026.

The spelling of 238318681 in words is "two hundred thirty-eight million, three hundred eighteen thousand, six hundred eighty-one".