520008993 has 48 divisors (see below), whose sum is σ = 874971136. Its totient is φ = 291483360.

The previous prime is 520008961. The next prime is 520008997. The reversal of 520008993 is 399800025.

It is not a de Polignac number, because 520008993 - 2⁵ = 520008961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520008997) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 823788 + ... + 824418.

Almost surely, 2^520008993 is an apocalyptic number.

It is an amenable number.

520008993 is a deficient number, since it is larger than the sum of its proper divisors (354962143).

520008993 is a wasteful number, since it uses less digits than its factorization.

520008993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874 (or 871 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 520008993 is about 22803.7056856994. The cubic root of 520008993 is about 804.1497873817.

The spelling of 520008993 in words is "five hundred twenty million, eight thousand, nine hundred ninety-three".