56675809 has 2 divisors, whose sum is σ = 56675810. Its totient is φ = 56675808.

The previous prime is 56675791. The next prime is 56675819. The reversal of 56675809 is 90857665.

56675809 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., 55175184 + 1500625 = 7428^2 + 1225^2 .

It is a cyclic number.

It is not a de Polignac number, because 56675809 - 2⁵ = 56675777 is a prime.

It is not a weakly prime, because it can be changed into another prime (56675819) 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, 28337904 + 28337905.

It is an arithmetic number, because the mean of its divisors is an integer number (28337905).

Almost surely, 2^56675809 is an apocalyptic number.

It is an amenable number.

56675809 is a deficient number, since it is larger than the sum of its proper divisors (1).

56675809 is an equidigital number, since it uses as much as digits as its factorization.

56675809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 56675809 is about 7528.3337465870. Note that the first 3 decimals coincide. The cubic root of 56675809 is about 384.1191059384.

It can be divided in two parts, 5667 and 5809, that added together give a triangular number (11476 = T₁₅₁).

The spelling of 56675809 in words is "fifty-six million, six hundred seventy-five thousand, eight hundred nine".