8634021793 has 2 divisors, whose sum is σ = 8634021794. Its totient is φ = 8634021792.

The previous prime is 8634021779. The next prime is 8634021853. The reversal of 8634021793 is 3971204368.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8274995089 + 359026704 = 90967^2 + 18948^2 .

It is a cyclic number.

It is not a de Polignac number, because 8634021793 - 2⁹ = 8634021281 is a prime.

It is not a weakly prime, because it can be changed into another prime (8634025793) 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, 4317010896 + 4317010897.

It is an arithmetic number, because the mean of its divisors is an integer number (4317010897).

Almost surely, 2^8634021793 is an apocalyptic number.

It is an amenable number.

8634021793 is a deficient number, since it is larger than the sum of its proper divisors (1).

8634021793 is an equidigital number, since it uses as much as digits as its factorization.

8634021793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 8634021793 is about 92919.4371108650. The cubic root of 8634021793 is about 2051.4977587516.

The spelling of 8634021793 in words is "eight billion, six hundred thirty-four million, twenty-one thousand, seven hundred ninety-three".