505020679 has 2 divisors, whose sum is σ = 505020680. Its totient is φ = 505020678.

The previous prime is 505020671. The next prime is 505020689. The reversal of 505020679 is 976020505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505020679 - 2³ = 505020671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505020671) 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 as a sum of consecutive naturals, namely, 252510339 + 252510340.

It is an arithmetic number, because the mean of its divisors is an integer number (252510340).

Almost surely, 2^505020679 is an apocalyptic number.

505020679 is a deficient number, since it is larger than the sum of its proper divisors (1).

505020679 is an equidigital number, since it uses as much as digits as its factorization.

505020679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 505020679 is about 22472.6651512454. The cubic root of 505020679 is about 796.3482936422.

The spelling of 505020679 in words is "five hundred five million, twenty thousand, six hundred seventy-nine".