8676844621 has 2 divisors, whose sum is σ = 8676844622. Its totient is φ = 8676844620.

The previous prime is 8676844549. The next prime is 8676844639. The reversal of 8676844621 is 1264486768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8502868521 + 173976100 = 92211^2 + 13190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8676844621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8676844661) 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, 4338422310 + 4338422311.

It is an arithmetic number, because the mean of its divisors is an integer number (4338422311).

Almost surely, 2^8676844621 is an apocalyptic number.

It is an amenable number.

8676844621 is a deficient number, since it is larger than the sum of its proper divisors (1).

8676844621 is an equidigital number, since it uses as much as digits as its factorization.

8676844621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3096576, while the sum is 52.

The square root of 8676844621 is about 93149.5819690030. The cubic root of 8676844621 is about 2054.8838244145.

The spelling of 8676844621 in words is "eight billion, six hundred seventy-six million, eight hundred forty-four thousand, six hundred twenty-one".