8205738539 has 2 divisors, whose sum is σ = 8205738540. Its totient is φ = 8205738538.

The previous prime is 8205738509. The next prime is 8205738599. The reversal of 8205738539 is 9358375028.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8205738539 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (8205738509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4102869269 + 4102869270.

It is an arithmetic number, because the mean of its divisors is an integer number (4102869270).

Almost surely, 2^8205738539 is an apocalyptic number.

8205738539 is a deficient number, since it is larger than the sum of its proper divisors (1).

8205738539 is an equidigital number, since it uses as much as digits as its factorization.

8205738539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The square root of 8205738539 is about 90585.5316206733. The cubic root of 8205738539 is about 2016.9999693565. Note that the first 4 decimals are identical.

The spelling of 8205738539 in words is "eight billion, two hundred five million, seven hundred thirty-eight thousand, five hundred thirty-nine".