520449563 has 4 divisors (see below), whose sum is σ = 521082768. Its totient is φ = 519816360.

The previous prime is 520449547. The next prime is 520449571. The reversal of 520449563 is 365944025.

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 520449563 - 2⁴ = 520449547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520449593) 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, 315368 + ... + 317013.

It is an arithmetic number, because the mean of its divisors is an integer number (130270692).

Almost surely, 2^520449563 is an apocalyptic number.

520449563 is a deficient number, since it is larger than the sum of its proper divisors (633205).

520449563 is an equidigital number, since it uses as much as digits as its factorization.

520449563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633204.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 520449563 is about 22813.3636932391. The cubic root of 520449563 is about 804.3768246507.

The spelling of 520449563 in words is "five hundred twenty million, four hundred forty-nine thousand, five hundred sixty-three".