520724207 has 4 divisors (see below), whose sum is σ = 520775640. Its totient is φ = 520672776.

The previous prime is 520724159. The next prime is 520724221. The reversal of 520724207 is 702427025.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 520724207 - 2²² = 516529903 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 520724207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520724107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4928 + ... + 32645.

It is an arithmetic number, because the mean of its divisors is an integer number (130193910).

Almost surely, 2^520724207 is an apocalyptic number.

520724207 is a deficient number, since it is larger than the sum of its proper divisors (51433).

520724207 is a wasteful number, since it uses less digits than its factorization.

520724207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51432.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 520724207 is about 22819.3822659598. The cubic root of 520724207 is about 804.5182910776.

The spelling of 520724207 in words is "five hundred twenty million, seven hundred twenty-four thousand, two hundred seven".