509761663 has 2 divisors, whose sum is σ = 509761664. Its totient is φ = 509761662.

The previous prime is 509761633. The next prime is 509761667. The reversal of 509761663 is 366167905.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 509761663 - 2⁹ = 509761151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509761667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254880831 + 254880832.

It is an arithmetic number, because the mean of its divisors is an integer number (254880832).

Almost surely, 2^509761663 is an apocalyptic number.

509761663 is a deficient number, since it is larger than the sum of its proper divisors (1).

509761663 is an equidigital number, since it uses as much as digits as its factorization.

509761663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 509761663 is about 22577.9020947474. The cubic root of 509761663 is about 798.8324964774.

The spelling of 509761663 in words is "five hundred nine million, seven hundred sixty-one thousand, six hundred sixty-three".