539861557 has 2 divisors, whose sum is σ = 539861558. Its totient is φ = 539861556.

The previous prime is 539861527. The next prime is 539861617. The reversal of 539861557 is 755168935.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 530565156 + 9296401 = 23034^2 + 3049^2 .

It is a cyclic number.

It is not a de Polignac number, because 539861557 - 2⁷ = 539861429 is a prime.

It is a super-3 number, since 3×539861557³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 539861557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (539861527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269930778 + 269930779.

It is an arithmetic number, because the mean of its divisors is an integer number (269930779).

Almost surely, 2^539861557 is an apocalyptic number.

It is an amenable number.

539861557 is a deficient number, since it is larger than the sum of its proper divisors (1).

539861557 is an equidigital number, since it uses as much as digits as its factorization.

539861557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1134000, while the sum is 49.

The square root of 539861557 is about 23234.9210672212. The cubic root of 539861557 is about 814.2556878975.

The spelling of 539861557 in words is "five hundred thirty-nine million, eight hundred sixty-one thousand, five hundred fifty-seven".