56806817 has 2 divisors, whose sum is σ = 56806818. Its totient is φ = 56806816.

The previous prime is 56806811. The next prime is 56806819. The reversal of 56806817 is 71860865.

56806817 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., 31091776 + 25715041 = 5576^2 + 5071^2 .

It is a cyclic number.

It is not a de Polignac number, because 56806817 - 2⁶ = 56806753 is a prime.

Together with 56806819, 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 (56806811) 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, 28403408 + 28403409.

It is an arithmetic number, because the mean of its divisors is an integer number (28403409).

Almost surely, 2^56806817 is an apocalyptic number.

It is an amenable number.

56806817 is a deficient number, since it is larger than the sum of its proper divisors (1).

56806817 is an equidigital number, since it uses as much as digits as its factorization.

56806817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 56806817 is about 7537.0297199892. The cubic root of 56806817 is about 384.4148461744.

The spelling of 56806817 in words is "fifty-six million, eight hundred six thousand, eight hundred seventeen".