539839669 has 4 divisors (see below), whose sum is σ = 558454860. Its totient is φ = 521224480.

The previous prime is 539839667. The next prime is 539839687. The reversal of 539839669 is 966938935.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 352012644 + 187827025 = 18762^2 + 13705^2 .

It is a cyclic number.

It is not a de Polignac number, because 539839669 - 2¹ = 539839667 is a prime.

It is a super-2 number, since 2×539839669² = 582853736452059122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (539839667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9307552 + ... + 9307609.

It is an arithmetic number, because the mean of its divisors is an integer number (139613715).

Almost surely, 2^539839669 is an apocalyptic number.

It is an amenable number.

539839669 is a deficient number, since it is larger than the sum of its proper divisors (18615191).

539839669 is a wasteful number, since it uses less digits than its factorization.

539839669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18615190.

The product of its digits is 9447840, while the sum is 58.

The square root of 539839669 is about 23234.4500472897. The cubic root of 539839669 is about 814.2446834284.

The spelling of 539839669 in words is "five hundred thirty-nine million, eight hundred thirty-nine thousand, six hundred sixty-nine".