539317861 has 4 divisors (see below), whose sum is σ = 540253132. Its totient is φ = 538382592.

The previous prime is 539317853. The next prime is 539317873. The reversal of 539317861 is 168713935.

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 466300836 + 73017025 = 21594^2 + 8545^2 .

It is a cyclic number.

It is not a de Polignac number, because 539317861 - 2³ = 539317853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (539317811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466770 + ... + 467923.

It is an arithmetic number, because the mean of its divisors is an integer number (135063283).

Almost surely, 2^539317861 is an apocalyptic number.

It is an amenable number.

539317861 is a deficient number, since it is larger than the sum of its proper divisors (935271).

539317861 is an equidigital number, since it uses as much as digits as its factorization.

539317861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935270.

The product of its digits is 136080, while the sum is 43.

The square root of 539317861 is about 23223.2181447792. The cubic root of 539317861 is about 813.9822497322.

The spelling of 539317861 in words is "five hundred thirty-nine million, three hundred seventeen thousand, eight hundred sixty-one".