557694509 has 2 divisors, whose sum is σ = 557694510. Its totient is φ = 557694508.

The previous prime is 557694499. The next prime is 557694521. The reversal of 557694509 is 905496755.

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., 557101609 + 592900 = 23603^2 + 770^2 .

It is a cyclic number.

It is not a de Polignac number, because 557694509 - 2⁸ = 557694253 is a prime.

It is a super-2 number, since 2×557694509² = 622046330737502162, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557694209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278847254 + 278847255.

It is an arithmetic number, because the mean of its divisors is an integer number (278847255).

Almost surely, 2^557694509 is an apocalyptic number.

It is an amenable number.

557694509 is a deficient number, since it is larger than the sum of its proper divisors (1).

557694509 is an equidigital number, since it uses as much as digits as its factorization.

557694509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1701000, while the sum is 50.

The square root of 557694509 is about 23615.5565041352. The cubic root of 557694509 is about 823.1243629079.

The spelling of 557694509 in words is "five hundred fifty-seven million, six hundred ninety-four thousand, five hundred nine".