509931082909 has 2 divisors, whose sum is σ = 509931082910. Its totient is φ = 509931082908.

The previous prime is 509931082877. The next prime is 509931082919. The reversal of 509931082909 is 909280139905.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 280691218809 + 229239864100 = 529803^2 + 478790^2 .

It is a cyclic number.

It is not a de Polignac number, because 509931082909 - 2⁵ = 509931082877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 509931082909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509931082919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254965541454 + 254965541455.

It is an arithmetic number, because the mean of its divisors is an integer number (254965541455).

Almost surely, 2^509931082909 is an apocalyptic number.

It is an amenable number.

509931082909 is a deficient number, since it is larger than the sum of its proper divisors (1).

509931082909 is an equidigital number, since it uses as much as digits as its factorization.

509931082909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1574640, while the sum is 55.

The spelling of 509931082909 in words is "five hundred nine billion, nine hundred thirty-one million, eighty-two thousand, nine hundred nine".