6539009129 has 2 divisors, whose sum is σ = 6539009130. Its totient is φ = 6539009128.

The previous prime is 6539009119. The next prime is 6539009159. The reversal of 6539009129 is 9219009356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6296739904 + 242269225 = 79352^2 + 15565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6539009129 is a prime.

It is a Sophie Germain 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 6539009129.

It is not a weakly prime, because it can be changed into another prime (6539009119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3269504564 + 3269504565.

It is an arithmetic number, because the mean of its divisors is an integer number (3269504565).

Almost surely, 2^6539009129 is an apocalyptic number.

It is an amenable number.

6539009129 is a deficient number, since it is larger than the sum of its proper divisors (1).

6539009129 is an equidigital number, since it uses as much as digits as its factorization.

6539009129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 131220, while the sum is 44.

The square root of 6539009129 is about 80864.1399447246. The cubic root of 6539009129 is about 1869.9815195444.

The spelling of 6539009129 in words is "six billion, five hundred thirty-nine million, nine thousand, one hundred twenty-nine".