505765977 has 8 divisors (see below), whose sum is σ = 676979616. Its totient is φ = 335864832.

The previous prime is 505765937. The next prime is 505765991. The reversal of 505765977 is 779567505.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 505765977 - 2⁷ = 505765849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505765937) 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 7 ways as a sum of consecutive naturals, for example, 327223 + ... + 328764.

It is an arithmetic number, because the mean of its divisors is an integer number (84622452).

Almost surely, 2^505765977 is an apocalyptic number.

It is an amenable number.

505765977 is a deficient number, since it is larger than the sum of its proper divisors (171213639).

505765977 is a wasteful number, since it uses less digits than its factorization.

505765977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656247.

The product of its (nonzero) digits is 2315250, while the sum is 51.

The square root of 505765977 is about 22489.2413611487. The cubic root of 505765977 is about 796.7398453074.

The spelling of 505765977 in words is "five hundred five million, seven hundred sixty-five thousand, nine hundred seventy-seven".