56648789 has 2 divisors, whose sum is σ = 56648790. Its totient is φ = 56648788.

The previous prime is 56648783. The next prime is 56648797. The reversal of 56648789 is 98784665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51008164 + 5640625 = 7142^2 + 2375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56648789 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 56648789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56648783) 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, 28324394 + 28324395.

It is an arithmetic number, because the mean of its divisors is an integer number (28324395).

Almost surely, 2^56648789 is an apocalyptic number.

It is an amenable number.

56648789 is a deficient number, since it is larger than the sum of its proper divisors (1).

56648789 is an equidigital number, since it uses as much as digits as its factorization.

56648789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 53.

The square root of 56648789 is about 7526.5389788401. The cubic root of 56648789 is about 384.0580537410.

The spelling of 56648789 in words is "fifty-six million, six hundred forty-eight thousand, seven hundred eighty-nine".