238723079681 has 2 divisors, whose sum is σ = 238723079682. Its totient is φ = 238723079680.

The previous prime is 238723079671. The next prime is 238723079711. The reversal of 238723079681 is 186970327832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 232332676081 + 6390403600 = 482009^2 + 79940^2 .

It is a cyclic number.

It is not a de Polignac number, because 238723079681 - 2³⁰ = 237649337857 is a prime.

It is a super-2 number, since 2×238723079681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (238723079611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119361539840 + 119361539841.

It is an arithmetic number, because the mean of its divisors is an integer number (119361539841).

Almost surely, 2^238723079681 is an apocalyptic number.

It is an amenable number.

238723079681 is a deficient number, since it is larger than the sum of its proper divisors (1).

238723079681 is an equidigital number, since it uses as much as digits as its factorization.

238723079681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6096384, while the sum is 56.

The spelling of 238723079681 in words is "two hundred thirty-eight billion, seven hundred twenty-three million, seventy-nine thousand, six hundred eighty-one".