8139820326917 has 2 divisors, whose sum is σ = 8139820326918. Its totient is φ = 8139820326916.

The previous prime is 8139820326901. The next prime is 8139820326949. The reversal of 8139820326917 is 7196230289318.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7770708184801 + 369112142116 = 2787599^2 + 607546^2 .

It is a cyclic number.

It is not a de Polignac number, because 8139820326917 - 2⁴ = 8139820326901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8139820386917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4069910163458 + 4069910163459.

It is an arithmetic number, because the mean of its divisors is an integer number (4069910163459).

Almost surely, 2^{8139820326917} is an apocalyptic number.

It is an amenable number.

8139820326917 is a deficient number, since it is larger than the sum of its proper divisors (1).

8139820326917 is an equidigital number, since it uses as much as digits as its factorization.

8139820326917 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 59.

The spelling of 8139820326917 in words is "eight trillion, one hundred thirty-nine billion, eight hundred twenty million, three hundred twenty-six thousand, nine hundred seventeen".