505223679 has 4 divisors (see below), whose sum is σ = 673631576. Its totient is φ = 336815784.

The previous prime is 505223657. The next prime is 505223683. The reversal of 505223679 is 976322505.

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

It is not a de Polignac number, because 505223679 - 2⁸ = 505223423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505223479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84203944 + ... + 84203949.

It is an arithmetic number, because the mean of its divisors is an integer number (168407894).

Almost surely, 2^505223679 is an apocalyptic number.

505223679 is a deficient number, since it is larger than the sum of its proper divisors (168407897).

505223679 is a wasteful number, since it uses less digits than its factorization.

505223679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168407896.

The product of its (nonzero) digits is 113400, while the sum is 39.

The square root of 505223679 is about 22477.1812957052. The cubic root of 505223679 is about 796.4549803944.

The spelling of 505223679 in words is "five hundred five million, two hundred twenty-three thousand, six hundred seventy-nine".