520423307 has 4 divisors (see below), whose sum is σ = 524396136. Its totient is φ = 516450480.

The previous prime is 520423279. The next prime is 520423349. The reversal of 520423307 is 703324025.

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 520423307 - 2⁸ = 520423051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520423207) 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, 1986218 + ... + 1986479.

It is an arithmetic number, because the mean of its divisors is an integer number (131099034).

Almost surely, 2^520423307 is an apocalyptic number.

520423307 is a deficient number, since it is larger than the sum of its proper divisors (3972829).

520423307 is a wasteful number, since it uses less digits than its factorization.

520423307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3972828.

The product of its (nonzero) digits is 5040, while the sum is 26.

The square root of 520423307 is about 22812.7882337955. The cubic root of 520423307 is about 804.3632978368.

The spelling of 520423307 in words is "five hundred twenty million, four hundred twenty-three thousand, three hundred seven".