539639805 has 16 divisors (see below), whose sum is σ = 908867520. Its totient is φ = 272659968.

The previous prime is 539639791. The next prime is 539639813. The reversal of 539639805 is 508936935.

It is not a de Polignac number, because 539639805 - 2⁷ = 539639677 is a prime.

It is a super-3 number, since 3×539639805³ (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 an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 946452 + ... + 947021.

It is an arithmetic number, because the mean of its divisors is an integer number (56804220).

Almost surely, 2^539639805 is an apocalyptic number.

It is an amenable number.

539639805 is a deficient number, since it is larger than the sum of its proper divisors (369227715).

539639805 is a wasteful number, since it uses less digits than its factorization.

539639805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1893500.

The product of its (nonzero) digits is 874800, while the sum is 48.

The square root of 539639805 is about 23230.1486219955. The cubic root of 539639805 is about 814.1441855113.

The spelling of 539639805 in words is "five hundred thirty-nine million, six hundred thirty-nine thousand, eight hundred five".