520688403 has 12 divisors (see below), whose sum is σ = 752370528. Its totient is φ = 347003280.

The previous prime is 520688387. The next prime is 520688437. The reversal of 520688403 is 304886025.

It is not a de Polignac number, because 520688403 - 2⁴ = 520688387 is a prime.

It is a super-2 number, since 2×520688403² = 542232826037380818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (520688473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22173 + ... + 39153.

It is an arithmetic number, because the mean of its divisors is an integer number (62697544).

Almost surely, 2^520688403 is an apocalyptic number.

520688403 is a deficient number, since it is larger than the sum of its proper divisors (231682125).

520688403 is a wasteful number, since it uses less digits than its factorization.

520688403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20394 (or 20391 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 520688403 is about 22818.5977439456. The cubic root of 520688403 is about 804.4998516090.

The spelling of 520688403 in words is "five hundred twenty million, six hundred eighty-eight thousand, four hundred three".