9564661 has 2 divisors, whose sum is σ = 9564662. Its totient is φ = 9564660.

The previous prime is 9564637. The next prime is 9564673. The reversal of 9564661 is 1664659.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8964036 + 600625 = 2994^2 + 775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9564661 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9564661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9564691) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4782330 + 4782331.

It is an arithmetic number, because the mean of its divisors is an integer number (4782331).

Almost surely, 2^9564661 is an apocalyptic number.

It is an amenable number.

9564661 is a deficient number, since it is larger than the sum of its proper divisors (1).

9564661 is an equidigital number, since it uses as much as digits as its factorization.

9564661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 37.

The square root of 9564661 is about 3092.6786124653. The cubic root of 9564661 is about 212.2706064382.

The spelling of 9564661 in words is "nine million, five hundred sixty-four thousand, six hundred sixty-one".