7539385109 has 2 divisors, whose sum is σ = 7539385110. Its totient is φ = 7539385108.

The previous prime is 7539385013. The next prime is 7539385111. The reversal of 7539385109 is 9015839357.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3859142884 + 3680242225 = 62122^2 + 60665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7539385109 is a prime.

It is a Sophie Germain prime.

Together with 7539385111, it forms a pair of twin primes.

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 (7539385129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3769692554 + 3769692555.

It is an arithmetic number, because the mean of its divisors is an integer number (3769692555).

Almost surely, 2^7539385109 is an apocalyptic number.

It is an amenable number.

7539385109 is a deficient number, since it is larger than the sum of its proper divisors (1).

7539385109 is an equidigital number, since it uses as much as digits as its factorization.

7539385109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1020600, while the sum is 50.

The square root of 7539385109 is about 86829.6326665039. The cubic root of 7539385109 is about 1960.8542289410.

The spelling of 7539385109 in words is "seven billion, five hundred thirty-nine million, three hundred eighty-five thousand, one hundred nine".