539843861 has 2 divisors, whose sum is σ = 539843862. Its totient is φ = 539843860.

The previous prime is 539843819. The next prime is 539843867. The reversal of 539843861 is 168348935.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 315772900 + 224070961 = 17770^2 + 14969^2 .

It is a cyclic number.

It is not a de Polignac number, because 539843861 - 2⁶ = 539843797 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (539843867) 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 as a sum of consecutive naturals, namely, 269921930 + 269921931.

It is an arithmetic number, because the mean of its divisors is an integer number (269921931).

Almost surely, 2^539843861 is an apocalyptic number.

It is an amenable number.

539843861 is a deficient number, since it is larger than the sum of its proper divisors (1).

539843861 is an equidigital number, since it uses as much as digits as its factorization.

539843861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 47.

The square root of 539843861 is about 23234.5402579866. The cubic root of 539843861 is about 814.2467910325.

The spelling of 539843861 in words is "five hundred thirty-nine million, eight hundred forty-three thousand, eight hundred sixty-one".