8227621 has 2 divisors, whose sum is σ = 8227622. Its totient is φ = 8227620.

The previous prime is 8227607. The next prime is 8227633. The reversal of 8227621 is 1267228.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5354596 + 2873025 = 2314^2 + 1695^2 .

It is a cyclic number.

It is not a de Polignac number, because 8227621 - 2¹¹ = 8225573 is a prime.

It is a Chen prime.

8227621 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8227621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8227601) 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, 4113810 + 4113811.

It is an arithmetic number, because the mean of its divisors is an integer number (4113811).

Almost surely, 2^8227621 is an apocalyptic number.

It is an amenable number.

8227621 is a deficient number, since it is larger than the sum of its proper divisors (1).

8227621 is an equidigital number, since it uses as much as digits as its factorization.

8227621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 28.

The square root of 8227621 is about 2868.3829939532. The cubic root of 8227621 is about 201.8791307100.

The spelling of 8227621 in words is "eight million, two hundred twenty-seven thousand, six hundred twenty-one".