509566342 has 4 divisors (see below), whose sum is σ = 764349516. Its totient is φ = 254783170.

The previous prime is 509566333. The next prime is 509566349. The reversal of 509566342 is 243665905.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 509566295 and 509566304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509566349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127391584 + ... + 127391587.

It is an arithmetic number, because the mean of its divisors is an integer number (191087379).

Almost surely, 2^509566342 is an apocalyptic number.

509566342 is a deficient number, since it is larger than the sum of its proper divisors (254783174).

509566342 is a wasteful number, since it uses less digits than its factorization.

509566342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254783173.

The product of its (nonzero) digits is 194400, while the sum is 40.

The square root of 509566342 is about 22573.5761898730. The cubic root of 509566342 is about 798.7304561805.

The spelling of 509566342 in words is "five hundred nine million, five hundred sixty-six thousand, three hundred forty-two".