557457709 has 2 divisors, whose sum is σ = 557457710. Its totient is φ = 557457708.

The previous prime is 557457679. The next prime is 557457743. The reversal of 557457709 is 907754755.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 370370025 + 187087684 = 19245^2 + 13678^2 .

It is a cyclic number.

It is not a de Polignac number, because 557457709 - 2²⁵ = 523903277 is a prime.

It is a super-3 number, since 3×557457709³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557407709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278728854 + 278728855.

It is an arithmetic number, because the mean of its divisors is an integer number (278728855).

Almost surely, 2^557457709 is an apocalyptic number.

It is an amenable number.

557457709 is a deficient number, since it is larger than the sum of its proper divisors (1).

557457709 is an equidigital number, since it uses as much as digits as its factorization.

557457709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1543500, while the sum is 49.

The square root of 557457709 is about 23610.5423275282. The cubic root of 557457709 is about 823.0078454478.

The spelling of 557457709 in words is "five hundred fifty-seven million, four hundred fifty-seven thousand, seven hundred nine".