8989621 has 2 divisors, whose sum is σ = 8989622. Its totient is φ = 8989620.

The previous prime is 8989609. The next prime is 8989627. The reversal of 8989621 is 1269898.

It is a happy number.

8989621 is digitally balanced in base 2, because in such base 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., 7263025 + 1726596 = 2695^2 + 1314^2 .

It is a cyclic number.

It is not a de Polignac number, because 8989621 - 2⁷ = 8989493 is a prime.

8989621 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8989627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4494810 + 4494811.

It is an arithmetic number, because the mean of its divisors is an integer number (4494811).

Almost surely, 2^8989621 is an apocalyptic number.

It is an amenable number.

8989621 is a deficient number, since it is larger than the sum of its proper divisors (1).

8989621 is an equidigital number, since it uses as much as digits as its factorization.

8989621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 43.

The square root of 8989621 is about 2998.2696676583. The cubic root of 8989621 is about 207.9283915853.

The spelling of 8989621 in words is "eight million, nine hundred eighty-nine thousand, six hundred twenty-one".