509946203797 has 2 divisors, whose sum is σ = 509946203798. Its totient is φ = 509946203796.

The previous prime is 509946203791. The next prime is 509946203827. The reversal of 509946203797 is 797302649905.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 313270806436 + 196675397361 = 559706^2 + 443481^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-509946203797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509946203791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254973101898 + 254973101899.

It is an arithmetic number, because the mean of its divisors is an integer number (254973101899).

Almost surely, 2^509946203797 is an apocalyptic number.

It is an amenable number.

509946203797 is a deficient number, since it is larger than the sum of its proper divisors (1).

509946203797 is an equidigital number, since it uses as much as digits as its factorization.

509946203797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25719120, while the sum is 61.

The spelling of 509946203797 in words is "five hundred nine billion, nine hundred forty-six million, two hundred three thousand, seven hundred ninety-seven".