509163594197 has 2 divisors, whose sum is σ = 509163594198. Its totient is φ = 509163594196.

The previous prime is 509163594161. The next prime is 509163594239. The reversal of 509163594197 is 791495361905.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 351452151556 + 157711442641 = 592834^2 + 397129^2 .

It is a cyclic number.

It is not a de Polignac number, because 509163594197 - 2⁸ = 509163593941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509163594097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254581797098 + 254581797099.

It is an arithmetic number, because the mean of its divisors is an integer number (254581797099).

Almost surely, 2^509163594197 is an apocalyptic number.

It is an amenable number.

509163594197 is a deficient number, since it is larger than the sum of its proper divisors (1).

509163594197 is an equidigital number, since it uses as much as digits as its factorization.

509163594197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9185400, while the sum is 59.

The spelling of 509163594197 in words is "five hundred nine billion, one hundred sixty-three million, five hundred ninety-four thousand, one hundred ninety-seven".