539293409 has 2 divisors, whose sum is σ = 539293410. Its totient is φ = 539293408.

The previous prime is 539293393. The next prime is 539293411. The reversal of 539293409 is 904392935.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 534904384 + 4389025 = 23128^2 + 2095^2 .

It is a cyclic number.

It is not a de Polignac number, because 539293409 - 2⁴ = 539293393 is a prime.

It is a Sophie Germain prime.

Together with 539293411, it forms a pair of twin primes.

It is a Chen prime.

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 539293409.

It is not a weakly prime, because it can be changed into another prime (539293609) 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, 269646704 + 269646705.

It is an arithmetic number, because the mean of its divisors is an integer number (269646705).

Almost surely, 2^539293409 is an apocalyptic number.

It is an amenable number.

539293409 is a deficient number, since it is larger than the sum of its proper divisors (1).

539293409 is an equidigital number, since it uses as much as digits as its factorization.

539293409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 262440, while the sum is 44.

The square root of 539293409 is about 23222.6916829208. The cubic root of 539293409 is about 813.9699478992.

The spelling of 539293409 in words is "five hundred thirty-nine million, two hundred ninety-three thousand, four hundred nine".