238885506889 has 2 divisors, whose sum is σ = 238885506890. Its totient is φ = 238885506888.

The previous prime is 238885506869. The next prime is 238885506919. The reversal of 238885506889 is 988605588832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209324550400 + 29560956489 = 457520^2 + 171933^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238885506889 is a prime.

It is a super-2 number, since 2×238885506889² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (238885506869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119442753444 + 119442753445.

It is an arithmetic number, because the mean of its divisors is an integer number (119442753445).

Almost surely, 2^238885506889 is an apocalyptic number.

It is an amenable number.

238885506889 is a deficient number, since it is larger than the sum of its proper divisors (1).

238885506889 is an equidigital number, since it uses as much as digits as its factorization.

238885506889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 265420800, while the sum is 70.

The spelling of 238885506889 in words is "two hundred thirty-eight billion, eight hundred eighty-five million, five hundred six thousand, eight hundred eighty-nine".