539004209 has 2 divisors, whose sum is σ = 539004210. Its totient is φ = 539004208.

The previous prime is 539004199. The next prime is 539004211. The reversal of 539004209 is 902400935.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 531164209 + 7840000 = 23047^2 + 2800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-539004209 is a prime.

Together with 539004211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (539001209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269502104 + 269502105.

It is an arithmetic number, because the mean of its divisors is an integer number (269502105).

Almost surely, 2^539004209 is an apocalyptic number.

It is an amenable number.

539004209 is a deficient number, since it is larger than the sum of its proper divisors (1).

539004209 is an equidigital number, since it uses as much as digits as its factorization.

539004209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 539004209 is about 23216.4641795429. The cubic root of 539004209 is about 813.8244227880.

The spelling of 539004209 in words is "five hundred thirty-nine million, four thousand, two hundred nine".