520599945 has 8 divisors (see below), whose sum is σ = 832959936. Its totient is φ = 277653296.

The previous prime is 520599931. The next prime is 520599949. The reversal of 520599945 is 549995025.

It is a happy number.

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 520599945 - 2⁵ = 520599913 is a prime.

It is a super-3 number, since 3×520599945³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 520599894 and 520599903.

It is not an unprimeable number, because it can be changed into a prime (520599949) 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, 17353317 + ... + 17353346.

It is an arithmetic number, because the mean of its divisors is an integer number (104119992).

Almost surely, 2^520599945 is an apocalyptic number.

It is an amenable number.

520599945 is a deficient number, since it is larger than the sum of its proper divisors (312359991).

520599945 is a wasteful number, since it uses less digits than its factorization.

520599945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34706671.

The product of its (nonzero) digits is 729000, while the sum is 48.

The square root of 520599945 is about 22816.6593742379. The cubic root of 520599945 is about 804.4542911050.

The spelling of 520599945 in words is "five hundred twenty million, five hundred ninety-nine thousand, nine hundred forty-five".