9209561 has 2 divisors, whose sum is σ = 9209562. Its totient is φ = 9209560.

The previous prime is 9209531. The next prime is 9209569. The reversal of 9209561 is 1659029.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8497225 + 712336 = 2915^2 + 844^2 .

It is an emirp because it is prime and its reverse (1659029) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9209561 - 2¹⁸ = 8947417 is a prime.

It is not a weakly prime, because it can be changed into another prime (9209569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4604780 + 4604781.

It is an arithmetic number, because the mean of its divisors is an integer number (4604781).

Almost surely, 2^9209561 is an apocalyptic number.

It is an amenable number.

9209561 is a deficient number, since it is larger than the sum of its proper divisors (1).

9209561 is an equidigital number, since it uses as much as digits as its factorization.

9209561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 9209561 is about 3034.7258525277. The cubic root of 9209561 is about 209.6104721692.

The spelling of 9209561 in words is "nine million, two hundred nine thousand, five hundred sixty-one".