509086804997 has 2 divisors, whose sum is σ = 509086804998. Its totient is φ = 509086804996.

The previous prime is 509086804979. The next prime is 509086805039. The reversal of 509086804997 is 799408680905.

Together with previous prime (509086804979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 501036049921 + 8050755076 = 707839^2 + 89726^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-509086804997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509086804927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254543402498 + 254543402499.

It is an arithmetic number, because the mean of its divisors is an integer number (254543402499).

Almost surely, 2^509086804997 is an apocalyptic number.

It is an amenable number.

509086804997 is a deficient number, since it is larger than the sum of its proper divisors (1).

509086804997 is an equidigital number, since it uses as much as digits as its factorization.

509086804997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39191040, while the sum is 65.

The spelling of 509086804997 in words is "five hundred nine billion, eighty-six million, eight hundred four thousand, nine hundred ninety-seven".