520354679 has 4 divisors (see below), whose sum is σ = 560381976. Its totient is φ = 480327384.

The previous prime is 520354673. The next prime is 520354693. The reversal of 520354679 is 976453025.

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 520354679 - 2²⁸ = 251919223 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 (520354673) 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, 20013629 + ... + 20013654.

It is an arithmetic number, because the mean of its divisors is an integer number (140095494).

Almost surely, 2^520354679 is an apocalyptic number.

520354679 is a deficient number, since it is larger than the sum of its proper divisors (40027297).

520354679 is a wasteful number, since it uses less digits than its factorization.

520354679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40027296.

The product of its (nonzero) digits is 226800, while the sum is 41.

The square root of 520354679 is about 22811.2840278666. The cubic root of 520354679 is about 804.3279392673.

The spelling of 520354679 in words is "five hundred twenty million, three hundred fifty-four thousand, six hundred seventy-nine".