539307729 has 9 divisors (see below), whose sum is σ = 779100699. Its totient is φ = 359492040.

The previous prime is 539307697. The next prime is 539307733. The reversal of 539307729 is 927703935.

The square root of 539307729 is 23223.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 110817729 + 428490000 = 10527^2 + 20700^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 539307729 - 2⁵ = 539307697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (539307739) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 65799 + ... + 73539.

Almost surely, 2^539307729 is an apocalyptic number.

539307729 is the 23223-rd square number.

539307729 is the 11612-nd centered octagonal number.

It is an amenable number.

539307729 is a deficient number, since it is larger than the sum of its proper divisors (239792970).

539307729 is an frugal number, since it uses more digits than its factorization.

539307729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15488 (or 7744 counting only the distinct ones).

The product of its (nonzero) digits is 357210, while the sum is 45.

The cubic root of 539307729 is about 813.9771523549.

The spelling of 539307729 in words is "five hundred thirty-nine million, three hundred seven thousand, seven hundred twenty-nine".