520669427 has 4 divisors (see below), whose sum is σ = 523787376. Its totient is φ = 517551480.

The previous prime is 520669411. The next prime is 520669441. The reversal of 520669427 is 724966025.

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

It is a cyclic number.

It is not a de Polignac number, because 520669427 - 2⁴ = 520669411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520669447) 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, 1558724 + ... + 1559057.

It is an arithmetic number, because the mean of its divisors is an integer number (130946844).

Almost surely, 2^520669427 is an apocalyptic number.

520669427 is a deficient number, since it is larger than the sum of its proper divisors (3117949).

520669427 is a wasteful number, since it uses less digits than its factorization.

520669427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3117948.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 520669427 is about 22818.1819389714. The cubic root of 520669427 is about 804.4900784096.

The spelling of 520669427 in words is "five hundred twenty million, six hundred sixty-nine thousand, four hundred twenty-seven".