8321386861 has 2 divisors, whose sum is σ = 8321386862. Its totient is φ = 8321386860.

The previous prime is 8321386793. The next prime is 8321386901. The reversal of 8321386861 is 1686831238.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8021889225 + 299497636 = 89565^2 + 17306^2 .

It is a cyclic number.

It is not a de Polignac number, because 8321386861 - 2⁹ = 8321386349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8321386261) 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, 4160693430 + 4160693431.

It is an arithmetic number, because the mean of its divisors is an integer number (4160693431).

Almost surely, 2^8321386861 is an apocalyptic number.

It is an amenable number.

8321386861 is a deficient number, since it is larger than the sum of its proper divisors (1).

8321386861 is an equidigital number, since it uses as much as digits as its factorization.

8321386861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 46.

The square root of 8321386861 is about 91221.6359259140. The cubic root of 8321386861 is about 2026.4313904287.

The spelling of 8321386861 in words is "eight billion, three hundred twenty-one million, three hundred eighty-six thousand, eight hundred sixty-one".