8964605921 has 2 divisors, whose sum is σ = 8964605922. Its totient is φ = 8964605920.

The previous prime is 8964605917. The next prime is 8964606019. The reversal of 8964605921 is 1295064698.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8956540321 + 8065600 = 94639^2 + 2840^2 .

It is a cyclic number.

It is not a de Polignac number, because 8964605921 - 2² = 8964605917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8964605921.

It is not a weakly prime, because it can be changed into another prime (8964605911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4482302960 + 4482302961.

It is an arithmetic number, because the mean of its divisors is an integer number (4482302961).

Almost surely, 2^8964605921 is an apocalyptic number.

It is an amenable number.

8964605921 is a deficient number, since it is larger than the sum of its proper divisors (1).

8964605921 is an equidigital number, since it uses as much as digits as its factorization.

8964605921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 933120, while the sum is 50.

The square root of 8964605921 is about 94681.6028645481. The cubic root of 8964605921 is about 2077.3534758702.

The spelling of 8964605921 in words is "eight billion, nine hundred sixty-four million, six hundred five thousand, nine hundred twenty-one".