509485517 has 2 divisors, whose sum is σ = 509485518. Its totient is φ = 509485516.

The previous prime is 509485477. The next prime is 509485541. The reversal of 509485517 is 715584905.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 301577956 + 207907561 = 17366^2 + 14419^2 .

It is a cyclic number.

It is not a de Polignac number, because 509485517 - 2¹⁸ = 509223373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509485547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254742758 + 254742759.

It is an arithmetic number, because the mean of its divisors is an integer number (254742759).

Almost surely, 2^509485517 is an apocalyptic number.

It is an amenable number.

509485517 is a deficient number, since it is larger than the sum of its proper divisors (1).

509485517 is an equidigital number, since it uses as much as digits as its factorization.

509485517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252000, while the sum is 44.

The square root of 509485517 is about 22571.7858620004. The cubic root of 509485517 is about 798.6882236667.

It can be divided in two parts, 50948 and 5517, that added together give a palindrome (56465).

The spelling of 509485517 in words is "five hundred nine million, four hundred eighty-five thousand, five hundred seventeen".