56573609 has 2 divisors, whose sum is σ = 56573610. Its totient is φ = 56573608.

The previous prime is 56573591. The next prime is 56573611. The reversal of 56573609 is 90637565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46963609 + 9610000 = 6853^2 + 3100^2 .

It is a cyclic number.

It is not a de Polignac number, because 56573609 - 2²⁰ = 55525033 is a prime.

Together with 56573611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56573639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28286804 + 28286805.

It is an arithmetic number, because the mean of its divisors is an integer number (28286805).

Almost surely, 2^56573609 is an apocalyptic number.

It is an amenable number.

56573609 is a deficient number, since it is larger than the sum of its proper divisors (1).

56573609 is an equidigital number, since it uses as much as digits as its factorization.

56573609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 170100, while the sum is 41.

The square root of 56573609 is about 7521.5429932960. The cubic root of 56573609 is about 383.8880809000. Note that the first 3 decimals are identical.

The spelling of 56573609 in words is "fifty-six million, five hundred seventy-three thousand, six hundred nine".