509016842 has 4 divisors (see below), whose sum is σ = 763525266. Its totient is φ = 254508420.

The previous prime is 509016803. The next prime is 509016853. The reversal of 509016842 is 248610905.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 248610905 = 5 ⋅49722181.

It can be written as a sum of positive squares in only one way, i.e., 341547361 + 167469481 = 18481^2 + 12941^2 .

It is an unprimeable number.

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, 127254209 + ... + 127254212.

Almost surely, 2^509016842 is an apocalyptic number.

509016842 is a deficient number, since it is larger than the sum of its proper divisors (254508424).

509016842 is a wasteful number, since it uses less digits than its factorization.

509016842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254508423.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 509016842 is about 22561.4015965321. The cubic root of 509016842 is about 798.4432444803.

The spelling of 509016842 in words is "five hundred nine million, sixteen thousand, eight hundred forty-two".