8639946499397 has 2 divisors, whose sum is σ = 8639946499398. Its totient is φ = 8639946499396.

The previous prime is 8639946499337. The next prime is 8639946499409. The reversal of 8639946499397 is 7939946499368.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8373841150081 + 266105349316 = 2893759^2 + 515854^2 .

It is a cyclic number.

It is not a de Polignac number, because 8639946499397 - 2⁸ = 8639946499141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8639946499337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4319973249698 + 4319973249699.

It is an arithmetic number, because the mean of its divisors is an integer number (4319973249699).

Almost surely, 2^{8639946499397} is an apocalyptic number.

It is an amenable number.

8639946499397 is a deficient number, since it is larger than the sum of its proper divisors (1).

8639946499397 is an equidigital number, since it uses as much as digits as its factorization.

8639946499397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17142160896, while the sum is 86.

The spelling of 8639946499397 in words is "eight trillion, six hundred thirty-nine billion, nine hundred forty-six million, four hundred ninety-nine thousand, three hundred ninety-seven".