520720413 has 8 divisors (see below), whose sum is σ = 695440128. Its totient is φ = 346573824.

The previous prime is 520720397. The next prime is 520720429. The reversal of 520720413 is 314027025.

It is an interprime number because it is at equal distance from previous prime (520720397) and next prime (520720429).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 520720413 - 2⁴ = 520720397 is a prime.

It is a super-2 number, since 2×520720413² = 542299497029781138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520720463) 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 7 ways as a sum of consecutive naturals, for example, 141156 + ... + 144797.

It is an arithmetic number, because the mean of its divisors is an integer number (86930016).

Almost surely, 2^520720413 is an apocalyptic number.

It is an amenable number.

520720413 is a deficient number, since it is larger than the sum of its proper divisors (174719715).

520720413 is a wasteful number, since it uses less digits than its factorization.

520720413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286563.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 520720413 is about 22819.2991347237. The cubic root of 520720413 is about 804.5163371644.

Adding to 520720413 its reverse (314027025), we get a palindrome (834747438).

The spelling of 520720413 in words is "five hundred twenty million, seven hundred twenty thousand, four hundred thirteen".