56583809 has 2 divisors, whose sum is σ = 56583810. Its totient is φ = 56583808.

The previous prime is 56583763. The next prime is 56583811. The reversal of 56583809 is 90838565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30030400 + 26553409 = 5480^2 + 5153^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56583809 is a prime.

Together with 56583811, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56583809.

It is not a weakly prime, because it can be changed into another prime (56583209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28291904 + 28291905.

It is an arithmetic number, because the mean of its divisors is an integer number (28291905).

Almost surely, 2^56583809 is an apocalyptic number.

It is an amenable number.

56583809 is a deficient number, since it is larger than the sum of its proper divisors (1).

56583809 is an equidigital number, since it uses as much as digits as its factorization.

56583809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 56583809 is about 7522.2210150992. The cubic root of 56583809 is about 383.9111506858.

The spelling of 56583809 in words is "fifty-six million, five hundred eighty-three thousand, eight hundred nine".