557390729 has 6 divisors (see below), whose sum is σ = 648393354. Its totient is φ = 477763440.

The previous prime is 557390711. The next prime is 557390737. The reversal of 557390729 is 927093755.

It can be written as a sum of positive squares in only one way, i.e., 312405625 + 244985104 = 17675^2 + 15652^2 .

It is not a de Polignac number, because 557390729 - 2⁸ = 557390473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (557390749) 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 in 5 ways as a sum of consecutive naturals, for example, 5687612 + ... + 5687709.

It is an arithmetic number, because the mean of its divisors is an integer number (108065559).

Almost surely, 2^557390729 is an apocalyptic number.

It is an amenable number.

557390729 is a deficient number, since it is larger than the sum of its proper divisors (91002625).

557390729 is a wasteful number, since it uses less digits than its factorization.

557390729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11375335 (or 11375328 counting only the distinct ones).

The product of its (nonzero) digits is 595350, while the sum is 47.

The square root of 557390729 is about 23609.1238507489. The cubic root of 557390729 is about 822.9748819467.

The spelling of 557390729 in words is "five hundred fifty-seven million, three hundred ninety thousand, seven hundred twenty-nine".