509464909 has 2 divisors, whose sum is σ = 509464910. Its totient is φ = 509464908.

The previous prime is 509464889. The next prime is 509464919. The reversal of 509464909 is 909464905.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 407151684 + 102313225 = 20178^2 + 10115^2 .

It is a cyclic number.

It is not a de Polignac number, because 509464909 - 2¹⁷ = 509333837 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509464919) 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, 254732454 + 254732455.

It is an arithmetic number, because the mean of its divisors is an integer number (254732455).

Almost surely, 2^509464909 is an apocalyptic number.

It is an amenable number.

509464909 is a deficient number, since it is larger than the sum of its proper divisors (1).

509464909 is an equidigital number, since it uses as much as digits as its factorization.

509464909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 509464909 is about 22571.3293582810. The cubic root of 509464909 is about 798.6774549021.

It can be divided in two parts, 50946 and 4909, that added together give a palindrome (55855).

The spelling of 509464909 in words is "five hundred nine million, four hundred sixty-four thousand, nine hundred nine".