520777 has 4 divisors (see below), whose sum is σ = 522436. Its totient is φ = 519120.

The previous prime is 520763. The next prime is 520787. The reversal of 520777 is 777025.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 147456 + 373321 = 384^2 + 611^2 .

It is a cyclic number.

It is not a de Polignac number, because 520777 - 2⁷ = 520649 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (520717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198 + ... + 1039.

It is an arithmetic number, because the mean of its divisors is an integer number (130609).

2⁵²⁰⁷⁷⁷ is an apocalyptic number.

It is an amenable number.

520777 is a deficient number, since it is larger than the sum of its proper divisors (1659).

520777 is a wasteful number, since it uses less digits than its factorization.

520777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658.

The product of its (nonzero) digits is 3430, while the sum is 28.

The square root of 520777 is about 721.6488065534. The cubic root of 520777 is about 80.4545478533.

The spelling of 520777 in words is "five hundred twenty thousand, seven hundred seventy-seven".