520490249 has 4 divisors (see below), whose sum is σ = 520590336. Its totient is φ = 520390164.

The previous prime is 520490239. The next prime is 520490281. The reversal of 520490249 is 942094025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 520490249 - 2⁴ = 520490233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520490239) 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, 41789 + ... + 52794.

It is an arithmetic number, because the mean of its divisors is an integer number (130147584).

Almost surely, 2^520490249 is an apocalyptic number.

It is an amenable number.

520490249 is a deficient number, since it is larger than the sum of its proper divisors (100087).

520490249 is an equidigital number, since it uses as much as digits as its factorization.

520490249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100086.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 520490249 is about 22814.2553899968. The cubic root of 520490249 is about 804.3977847494.

The spelling of 520490249 in words is "five hundred twenty million, four hundred ninety thousand, two hundred forty-nine".