538705009 has 2 divisors, whose sum is σ = 538705010. Its totient is φ = 538705008.

The previous prime is 538705007. The next prime is 538705019. The reversal of 538705009 is 900507835.

538705009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 332150625 + 206554384 = 18225^2 + 14372^2 .

It is a cyclic number.

It is not a de Polignac number, because 538705009 - 2¹ = 538705007 is a prime.

Together with 538705007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (538705007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269352504 + 269352505.

It is an arithmetic number, because the mean of its divisors is an integer number (269352505).

Almost surely, 2^538705009 is an apocalyptic number.

It is an amenable number.

538705009 is a deficient number, since it is larger than the sum of its proper divisors (1).

538705009 is an equidigital number, since it uses as much as digits as its factorization.

538705009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 538705009 is about 23210.0195820684. The cubic root of 538705009 is about 813.6738108931.

The spelling of 538705009 in words is "five hundred thirty-eight million, seven hundred five thousand, nine".