557257009 has 2 divisors, whose sum is σ = 557257010. Its totient is φ = 557257008.

The previous prime is 557257007. The next prime is 557257027. The reversal of 557257009 is 900752755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 380367009 + 176890000 = 19503^2 + 13300^2 .

It is a cyclic number.

It is not a de Polignac number, because 557257009 - 2¹ = 557257007 is a prime.

Together with 557257007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (557257003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278628504 + 278628505.

It is an arithmetic number, because the mean of its divisors is an integer number (278628505).

Almost surely, 2^557257009 is an apocalyptic number.

It is an amenable number.

557257009 is a deficient number, since it is larger than the sum of its proper divisors (1).

557257009 is an equidigital number, since it uses as much as digits as its factorization.

557257009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110250, while the sum is 40.

The square root of 557257009 is about 23606.2917248771. The cubic root of 557257009 is about 822.9090651585.

The spelling of 557257009 in words is "five hundred fifty-seven million, two hundred fifty-seven thousand, nine".