505777 has 2 divisors, whose sum is σ = 505778. Its totient is φ = 505776.

The previous prime is 505763. The next prime is 505781. The reversal of 505777 is 777505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 505521 + 256 = 711^2 + 16^2 .

It is a cyclic number.

It is not a de Polignac number, because 505777 - 2¹⁵ = 473009 is a prime.

It is not a weakly prime, because it can be changed into another prime (505727) 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 as a sum of consecutive naturals, namely, 252888 + 252889.

It is an arithmetic number, because the mean of its divisors is an integer number (252889).

2⁵⁰⁵⁷⁷⁷ is an apocalyptic number.

It is an amenable number.

505777 is a deficient number, since it is larger than the sum of its proper divisors (1).

505777 is an equidigital number, since it uses as much as digits as its factorization.

505777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8575, while the sum is 31.

The square root of 505777 is about 711.1800053432. The cubic root of 505777 is about 79.6745633491.

The spelling of 505777 in words is "five hundred five thousand, seven hundred seventy-seven".