57557839 has 2 divisors, whose sum is σ = 57557840. Its totient is φ = 57557838.

The previous prime is 57557827. The next prime is 57557873. The reversal of 57557839 is 93875575.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57557839 - 2¹¹ = 57555791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 57557792 and 57557801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57557879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28778919 + 28778920.

It is an arithmetic number, because the mean of its divisors is an integer number (28778920).

Almost surely, 2^57557839 is an apocalyptic number.

57557839 is a deficient number, since it is larger than the sum of its proper divisors (1).

57557839 is an equidigital number, since it uses as much as digits as its factorization.

57557839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1323000, while the sum is 49.

The square root of 57557839 is about 7586.6882761848. The cubic root of 57557839 is about 386.1015039957.

The spelling of 57557839 in words is "fifty-seven million, five hundred fifty-seven thousand, eight hundred thirty-nine".