509720074 has 4 divisors (see below), whose sum is σ = 764580114. Its totient is φ = 254860036.

The previous prime is 509720063. The next prime is 509720111. The reversal of 509720074 is 470027905.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 470027905 = 5 ⋅94005581.

It can be written as a sum of positive squares in only one way, i.e., 409860025 + 99860049 = 20245^2 + 9993^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127430017 + ... + 127430020.

Almost surely, 2^509720074 is an apocalyptic number.

509720074 is a deficient number, since it is larger than the sum of its proper divisors (254860040).

509720074 is a wasteful number, since it uses less digits than its factorization.

509720074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254860039.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 509720074 is about 22576.9810647925. The cubic root of 509720074 is about 798.8107715874.

Adding to 509720074 its reverse (470027905), we get a palindrome (979747979).

The spelling of 509720074 in words is "five hundred nine million, seven hundred twenty thousand, seventy-four".