520065769 has 4 divisors (see below), whose sum is σ = 526648960. Its totient is φ = 513482580.

The previous prime is 520065761. The next prime is 520065781. The reversal of 520065769 is 967560025.

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 520065769 - 2³ = 520065761 is a prime.

It is a super-2 number, since 2×520065769² = 540936808171122722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520065761) 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, 3291477 + ... + 3291634.

It is an arithmetic number, because the mean of its divisors is an integer number (131662240).

Almost surely, 2^520065769 is an apocalyptic number.

It is an amenable number.

520065769 is a deficient number, since it is larger than the sum of its proper divisors (6583191).

520065769 is an equidigital number, since it uses as much as digits as its factorization.

520065769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6583190.

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 520065769 is about 22804.9505371093. The cubic root of 520065769 is about 804.1790527389.

It can be divided in two parts, 52006 and 5769, that added together give a palindrome (57775).

The spelling of 520065769 in words is "five hundred twenty million, sixty-five thousand, seven hundred sixty-nine".