520478867 has 4 divisors (see below), whose sum is σ = 521721480. Its totient is φ = 519236256.

The previous prime is 520478843. The next prime is 520478869. The reversal of 520478867 is 768874025.

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 520478867 - 2¹⁴ = 520462483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520478869) 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, 620678 + ... + 621515.

It is an arithmetic number, because the mean of its divisors is an integer number (130430370).

Almost surely, 2^520478867 is an apocalyptic number.

520478867 is a deficient number, since it is larger than the sum of its proper divisors (1242613).

520478867 is a wasteful number, since it uses less digits than its factorization.

520478867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242612.

The product of its (nonzero) digits is 752640, while the sum is 47.

The square root of 520478867 is about 22814.0059393347. The cubic root of 520478867 is about 804.3919212247.

The spelling of 520478867 in words is "five hundred twenty million, four hundred seventy-eight thousand, eight hundred sixty-seven".