509649447 has 8 divisors (see below), whose sum is σ = 685767280. Its totient is φ = 336648960.

The previous prime is 509649401. The next prime is 509649463. The reversal of 509649447 is 744946905.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 509649447 - 2⁶ = 509649383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 509649396 and 509649405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509649467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 778954 + ... + 779607.

It is an arithmetic number, because the mean of its divisors is an integer number (85720910).

Almost surely, 2^509649447 is an apocalyptic number.

509649447 is a deficient number, since it is larger than the sum of its proper divisors (176117833).

509649447 is a wasteful number, since it uses less digits than its factorization.

509649447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558673.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The square root of 509649447 is about 22575.4168732274. The cubic root of 509649447 is about 798.7738753789.

The spelling of 509649447 in words is "five hundred nine million, six hundred forty-nine thousand, four hundred forty-seven".