86643079321 has 2 divisors, whose sum is σ = 86643079322. Its totient is φ = 86643079320.

The previous prime is 86643079309. The next prime is 86643079337. The reversal of 86643079321 is 12397034668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50710085721 + 35932993600 = 225189^2 + 189560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86643079321 is a prime.

It is not a weakly prime, because it can be changed into another prime (86643079351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43321539660 + 43321539661.

It is an arithmetic number, because the mean of its divisors is an integer number (43321539661).

Almost surely, 2^86643079321 is an apocalyptic number.

It is an amenable number.

86643079321 is a deficient number, since it is larger than the sum of its proper divisors (1).

86643079321 is an equidigital number, since it uses as much as digits as its factorization.

86643079321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The spelling of 86643079321 in words is "eighty-six billion, six hundred forty-three million, seventy-nine thousand, three hundred twenty-one".