238972681 has 2 divisors, whose sum is σ = 238972682. Its totient is φ = 238972680.

The previous prime is 238972667. The next prime is 238972703. The reversal of 238972681 is 186279832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164737225 + 74235456 = 12835^2 + 8616^2 .

It is a cyclic number.

It is not a de Polignac number, because 238972681 - 2⁵ = 238972649 is a prime.

It is a super-2 number, since 2×238972681² = 114215884528655522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (238972081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119486340 + 119486341.

It is an arithmetic number, because the mean of its divisors is an integer number (119486341).

Almost surely, 2^238972681 is an apocalyptic number.

It is an amenable number.

238972681 is a deficient number, since it is larger than the sum of its proper divisors (1).

238972681 is an equidigital number, since it uses as much as digits as its factorization.

238972681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 46.

The square root of 238972681 is about 15458.7412488857. The cubic root of 238972681 is about 620.5585332824.

The spelling of 238972681 in words is "two hundred thirty-eight million, nine hundred seventy-two thousand, six hundred eighty-one".