56577749 has 2 divisors, whose sum is σ = 56577750. Its totient is φ = 56577748.

The previous prime is 56577743. The next prime is 56577761. The reversal of 56577749 is 94777565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46144849 + 10432900 = 6793^2 + 3230^2 .

It is a cyclic number.

It is not a de Polignac number, because 56577749 - 2⁴ = 56577733 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 56577697 and 56577706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56577743) 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, 28288874 + 28288875.

It is an arithmetic number, because the mean of its divisors is an integer number (28288875).

Almost surely, 2^56577749 is an apocalyptic number.

It is an amenable number.

56577749 is a deficient number, since it is larger than the sum of its proper divisors (1).

56577749 is an equidigital number, since it uses as much as digits as its factorization.

56577749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1852200, while the sum is 50.

The square root of 56577749 is about 7521.8181977498. The cubic root of 56577749 is about 383.8974448533.

The spelling of 56577749 in words is "fifty-six million, five hundred seventy-seven thousand, seven hundred forty-nine".