557821349 has 2 divisors, whose sum is σ = 557821350. Its totient is φ = 557821348.

The previous prime is 557821321. The next prime is 557821379. The reversal of 557821349 is 943128755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 341584324 + 216237025 = 18482^2 + 14705^2 .

It is a cyclic number.

It is not a de Polignac number, because 557821349 - 2²⁰ = 556772773 is a prime.

It is a super-2 number, since 2×557821349² = 622329314800359602, 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 (557821309) 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, 278910674 + 278910675.

It is an arithmetic number, because the mean of its divisors is an integer number (278910675).

Almost surely, 2^557821349 is an apocalyptic number.

It is an amenable number.

557821349 is a deficient number, since it is larger than the sum of its proper divisors (1).

557821349 is an equidigital number, since it uses as much as digits as its factorization.

557821349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 44.

The square root of 557821349 is about 23618.2418693687. The cubic root of 557821349 is about 823.1867609761.

The spelling of 557821349 in words is "five hundred fifty-seven million, eight hundred twenty-one thousand, three hundred forty-nine".