56781589 has 2 divisors, whose sum is σ = 56781590. Its totient is φ = 56781588.

The previous prime is 56781563. The next prime is 56781601. The reversal of 56781589 is 98518765.

56781589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33837489 + 22944100 = 5817^2 + 4790^2 .

It is a cyclic number.

It is not a de Polignac number, because 56781589 - 2⁹ = 56781077 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56781509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28390794 + 28390795.

It is an arithmetic number, because the mean of its divisors is an integer number (28390795).

Almost surely, 2^56781589 is an apocalyptic number.

It is an amenable number.

56781589 is a deficient number, since it is larger than the sum of its proper divisors (1).

56781589 is an equidigital number, since it uses as much as digits as its factorization.

56781589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 49.

The square root of 56781589 is about 7535.3559305450. The cubic root of 56781589 is about 384.3579313283.

The spelling of 56781589 in words is "fifty-six million, seven hundred eighty-one thousand, five hundred eighty-nine".