509475469 has 2 divisors, whose sum is σ = 509475470. Its totient is φ = 509475468.

The previous prime is 509475467. The next prime is 509475511. The reversal of 509475469 is 964574905.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 464919844 + 44555625 = 21562^2 + 6675^2 .

It is a cyclic number.

It is not a de Polignac number, because 509475469 - 2¹ = 509475467 is a prime.

It is a super-2 number, since 2×509475469² = 519130507025539922, which contains 22 as substring.

Together with 509475467, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509475467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254737734 + 254737735.

It is an arithmetic number, because the mean of its divisors is an integer number (254737735).

Almost surely, 2^509475469 is an apocalyptic number.

It is an amenable number.

509475469 is a deficient number, since it is larger than the sum of its proper divisors (1).

509475469 is an equidigital number, since it uses as much as digits as its factorization.

509475469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The square root of 509475469 is about 22571.5632821477. The cubic root of 509475469 is about 798.6829730942.

The spelling of 509475469 in words is "five hundred nine million, four hundred seventy-five thousand, four hundred sixty-nine".