557181623 has 2 divisors, whose sum is σ = 557181624. Its totient is φ = 557181622.

The previous prime is 557181617. The next prime is 557181673. The reversal of 557181623 is 326181755.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 557181623 - 2⁴ = 557181607 is a prime.

It is a super-3 number, since 3×557181623³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557181673) 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, 278590811 + 278590812.

It is an arithmetic number, because the mean of its divisors is an integer number (278590812).

Almost surely, 2^557181623 is an apocalyptic number.

557181623 is a deficient number, since it is larger than the sum of its proper divisors (1).

557181623 is an equidigital number, since it uses as much as digits as its factorization.

557181623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 38.

The square root of 557181623 is about 23604.6949355420. The cubic root of 557181623 is about 822.8719556385.

The spelling of 557181623 in words is "five hundred fifty-seven million, one hundred eighty-one thousand, six hundred twenty-three".