505779 has 8 divisors (see below), whose sum is σ = 687312. Its totient is φ = 330720.

The previous prime is 505777. The next prime is 505781. The reversal of 505779 is 977505.

It is an interprime number because it is at equal distance from previous prime (505777) and next prime (505781).

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

It is not a de Polignac number, because 505779 - 2¹ = 505777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1432 + ... + 1749.

It is an arithmetic number, because the mean of its divisors is an integer number (85914).

2⁵⁰⁵⁷⁷⁹ is an apocalyptic number.

505779 is a deficient number, since it is larger than the sum of its proper divisors (181533).

505779 is a wasteful number, since it uses less digits than its factorization.

505779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3237.

The product of its (nonzero) digits is 11025, while the sum is 33.

The square root of 505779 is about 711.1814114556. The cubic root of 505779 is about 79.6746683684.

The spelling of 505779 in words is "five hundred five thousand, seven hundred seventy-nine".