56766289 has 2 divisors, whose sum is σ = 56766290. Its totient is φ = 56766288.

The previous prime is 56766223. The next prime is 56766293. The reversal of 56766289 is 98266765.

It is a happy number.

56766289 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., 33408400 + 23357889 = 5780^2 + 4833^2 .

It is a cyclic number.

It is not a de Polignac number, because 56766289 - 2⁹ = 56765777 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56766209) 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, 28383144 + 28383145.

It is an arithmetic number, because the mean of its divisors is an integer number (28383145).

Almost surely, 2^56766289 is an apocalyptic number.

It is an amenable number.

56766289 is a deficient number, since it is larger than the sum of its proper divisors (1).

56766289 is an equidigital number, since it uses as much as digits as its factorization.

56766289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 49.

The square root of 56766289 is about 7534.3406479930. The cubic root of 56766289 is about 384.3234060258.

The spelling of 56766289 in words is "fifty-six million, seven hundred sixty-six thousand, two hundred eighty-nine".