509613649 has 8 divisors (see below), whose sum is σ = 538845440. Its totient is φ = 480622896.

The previous prime is 509613613. The next prime is 509613659. The reversal of 509613649 is 946316905.

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

It is a cyclic number.

It is not a de Polignac number, because 509613649 - 2¹⁷ = 509482577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (509613659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55902 + ... + 64375.

It is an arithmetic number, because the mean of its divisors is an integer number (67355680).

Almost surely, 2^509613649 is an apocalyptic number.

It is an amenable number.

509613649 is a deficient number, since it is larger than the sum of its proper divisors (29231791).

509613649 is a wasteful number, since it uses less digits than its factorization.

509613649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120519.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 509613649 is about 22574.6240057282. The cubic root of 509613649 is about 798.7551728656.

The spelling of 509613649 in words is "five hundred nine million, six hundred thirteen thousand, six hundred forty-nine".