520534423 has 4 divisors (see below), whose sum is σ = 537325888. Its totient is φ = 503742960.

The previous prime is 520534409. The next prime is 520534429. The reversal of 520534423 is 324435025.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520534423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520534391 and 520534400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520534429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8395686 + ... + 8395747.

It is an arithmetic number, because the mean of its divisors is an integer number (134331472).

Almost surely, 2^520534423 is an apocalyptic number.

520534423 is a deficient number, since it is larger than the sum of its proper divisors (16791465).

520534423 is a wasteful number, since it uses less digits than its factorization.

520534423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16791464.

The product of its (nonzero) digits is 14400, while the sum is 28.

The square root of 520534423 is about 22815.2234922212. The cubic root of 520534423 is about 804.4205405152.

Adding to 520534423 its reverse (324435025), we get a palindrome (844969448).

The spelling of 520534423 in words is "five hundred twenty million, five hundred thirty-four thousand, four hundred twenty-three".