539688081 has 4 divisors (see below), whose sum is σ = 719584112. Its totient is φ = 359792052.

The previous prime is 539688047. The next prime is 539688101. The reversal of 539688081 is 180886935.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 539688081 - 2¹⁵ = 539655313 is a prime.

It is a super-2 number, since 2×539688081² = 582526449546925122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 539688081.

It is not an unprimeable number, because it can be changed into a prime (539688181) 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, 89948011 + ... + 89948016.

It is an arithmetic number, because the mean of its divisors is an integer number (179896028).

Almost surely, 2^539688081 is an apocalyptic number.

It is an amenable number.

539688081 is a deficient number, since it is larger than the sum of its proper divisors (179896031).

539688081 is a wasteful number, since it uses less digits than its factorization.

539688081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179896030.

The product of its (nonzero) digits is 414720, while the sum is 48.

The square root of 539688081 is about 23231.1876794967. The cubic root of 539688081 is about 814.1684624780.

The spelling of 539688081 in words is "five hundred thirty-nine million, six hundred eighty-eight thousand, eighty-one".