539439309 has 12 divisors (see below), whose sum is σ = 813068256. Its totient is φ = 343990152.

The previous prime is 539439293. The next prime is 539439347. The reversal of 539439309 is 903934935.

It is not a de Polignac number, because 539439309 - 2⁴ = 539439293 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (539439389) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1302787 + ... + 1303200.

It is an arithmetic number, because the mean of its divisors is an integer number (67755688).

Almost surely, 2^539439309 is an apocalyptic number.

It is an amenable number.

539439309 is a deficient number, since it is larger than the sum of its proper divisors (273628947).

539439309 is a wasteful number, since it uses less digits than its factorization.

539439309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2606016 (or 2606013 counting only the distinct ones).

The product of its (nonzero) digits is 393660, while the sum is 45.

The square root of 539439309 is about 23225.8327945415. The cubic root of 539439309 is about 814.0433448697.

The spelling of 539439309 in words is "five hundred thirty-nine million, four hundred thirty-nine thousand, three hundred nine".