520274289 has 4 divisors (see below), whose sum is σ = 693699056. Its totient is φ = 346849524.

The previous prime is 520274269. The next prime is 520274299. The reversal of 520274289 is 982472025.

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 de Polignac number, because none of the positive numbers 2^k-520274289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520274269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86712379 + ... + 86712384.

It is an arithmetic number, because the mean of its divisors is an integer number (173424764).

Almost surely, 2^520274289 is an apocalyptic number.

It is an amenable number.

520274289 is a deficient number, since it is larger than the sum of its proper divisors (173424767).

520274289 is a wasteful number, since it uses less digits than its factorization.

520274289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173424766.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 520274289 is about 22809.5218932796. The cubic root of 520274289 is about 804.2865167173.

The spelling of 520274289 in words is "five hundred twenty million, two hundred seventy-four thousand, two hundred eighty-nine".