557279809 has 2 divisors, whose sum is σ = 557279810. Its totient is φ = 557279808.

The previous prime is 557279797. The next prime is 557279851. The reversal of 557279809 is 908972755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 447449409 + 109830400 = 21153^2 + 10480^2 .

It is a cyclic number.

It is not a de Polignac number, because 557279809 - 2¹⁷ = 557148737 is a prime.

It is not a weakly prime, because it can be changed into another prime (557279869) 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, 278639904 + 278639905.

It is an arithmetic number, because the mean of its divisors is an integer number (278639905).

Almost surely, 2^557279809 is an apocalyptic number.

It is an amenable number.

557279809 is a deficient number, since it is larger than the sum of its proper divisors (1).

557279809 is an equidigital number, since it uses as much as digits as its factorization.

557279809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1587600, while the sum is 52.

The square root of 557279809 is about 23606.7746420387. The cubic root of 557279809 is about 822.9202880296.

It can be divided in two parts, 55727 and 9809, that added together give a 16-th power (65536 = 2¹⁶).

The spelling of 557279809 in words is "five hundred fifty-seven million, two hundred seventy-nine thousand, eight hundred nine".