557639 has 2 divisors, whose sum is σ = 557640. Its totient is φ = 557638.

The previous prime is 557633. The next prime is 557663. The reversal of 557639 is 936755.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 557639 - 2¹² = 553543 is a prime.

It is a super-2 number, since 2×557639² = 621922508642, which contains 22 as substring.

It is a d-powerful number, because it can be written as 5⁵ + 5⁵ + 6³ + 7² + 3⁹ + 9⁶ .

It is a junction number, because it is equal to n+sod(n) for n = 557599 and 557608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278819 + 278820.

It is an arithmetic number, because the mean of its divisors is an integer number (278820).

2⁵⁵⁷⁶³⁹ is an apocalyptic number.

557639 is a deficient number, since it is larger than the sum of its proper divisors (1).

557639 is an equidigital number, since it uses as much as digits as its factorization.

557639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28350, while the sum is 35.

The square root of 557639 is about 746.7523016369. The cubic root of 557639 is about 82.3097052660.

The spelling of 557639 in words is "five hundred fifty-seven thousand, six hundred thirty-nine".