238902386917 has 2 divisors, whose sum is σ = 238902386918. Its totient is φ = 238902386916.

The previous prime is 238902386873. The next prime is 238902386959. The reversal of 238902386917 is 719683209832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188148605121 + 50753781796 = 433761^2 + 225286^2 .

It is a cyclic number.

It is not a de Polignac number, because 238902386917 - 2¹⁹ = 238901862629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238902381917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119451193458 + 119451193459.

It is an arithmetic number, because the mean of its divisors is an integer number (119451193459).

Almost surely, 2^238902386917 is an apocalyptic number.

It is an amenable number.

238902386917 is a deficient number, since it is larger than the sum of its proper divisors (1).

238902386917 is an equidigital number, since it uses as much as digits as its factorization.

238902386917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7838208, while the sum is 58.

The spelling of 238902386917 in words is "two hundred thirty-eight billion, nine hundred two million, three hundred eighty-six thousand, nine hundred seventeen".