8628530621 has 2 divisors, whose sum is σ = 8628530622. Its totient is φ = 8628530620.

The previous prime is 8628530567. The next prime is 8628530657. The reversal of 8628530621 is 1260358268.

8628530621 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8026368100 + 602162521 = 89590^2 + 24539^2 .

It is a cyclic number.

It is not a de Polignac number, because 8628530621 - 2¹⁸ = 8628268477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8628538621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4314265310 + 4314265311.

It is an arithmetic number, because the mean of its divisors is an integer number (4314265311).

Almost surely, 2^8628530621 is an apocalyptic number.

It is an amenable number.

8628530621 is a deficient number, since it is larger than the sum of its proper divisors (1).

8628530621 is an equidigital number, since it uses as much as digits as its factorization.

8628530621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 8628530621 is about 92889.8843846842. The cubic root of 8628530621 is about 2051.0627542101.

Adding to 8628530621 its reverse (1260358268), we get a palindrome (9888888889).

The spelling of 8628530621 in words is "eight billion, six hundred twenty-eight million, five hundred thirty thousand, six hundred twenty-one".