520601623 has 4 divisors (see below), whose sum is σ = 520657200. Its totient is φ = 520546048.

The previous prime is 520601621. The next prime is 520601651. The reversal of 520601623 is 326106025.

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 520601623 - 2¹ = 520601621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520601621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9898 + ... + 33751.

It is an arithmetic number, because the mean of its divisors is an integer number (130164300).

Almost surely, 2^520601623 is an apocalyptic number.

520601623 is a deficient number, since it is larger than the sum of its proper divisors (55577).

520601623 is a wasteful number, since it uses less digits than its factorization.

520601623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55576.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 520601623 is about 22816.6961455860. The cubic root of 520601623 is about 804.4551554109.

Adding to 520601623 its reverse (326106025), we get a palindrome (846707648).

The spelling of 520601623 in words is "five hundred twenty million, six hundred one thousand, six hundred twenty-three".