8963393821 has 2 divisors, whose sum is σ = 8963393822. Its totient is φ = 8963393820.

The previous prime is 8963393759. The next prime is 8963393861. The reversal of 8963393821 is 1283933698.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5412544900 + 3550848921 = 73570^2 + 59589^2 .

It is a cyclic number.

It is not a de Polignac number, because 8963393821 - 2¹⁹ = 8962869533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8963393861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4481696910 + 4481696911.

It is an arithmetic number, because the mean of its divisors is an integer number (4481696911).

Almost surely, 2^8963393821 is an apocalyptic number.

It is an amenable number.

8963393821 is a deficient number, since it is larger than the sum of its proper divisors (1).

8963393821 is an equidigital number, since it uses as much as digits as its factorization.

8963393821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 52.

The square root of 8963393821 is about 94675.2017214645. The cubic root of 8963393821 is about 2077.2598456663.

The spelling of 8963393821 in words is "eight billion, nine hundred sixty-three million, three hundred ninety-three thousand, eight hundred twenty-one".