505728863 has 2 divisors, whose sum is σ = 505728864. Its totient is φ = 505728862.

The previous prime is 505728851. The next prime is 505728887. The reversal of 505728863 is 368827505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505728863 - 2⁶ = 505728799 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505728893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252864431 + 252864432.

It is an arithmetic number, because the mean of its divisors is an integer number (252864432).

Almost surely, 2^505728863 is an apocalyptic number.

505728863 is a deficient number, since it is larger than the sum of its proper divisors (1).

505728863 is an equidigital number, since it uses as much as digits as its factorization.

505728863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403200, while the sum is 44.

The square root of 505728863 is about 22488.4161958996. The cubic root of 505728863 is about 796.7203561054.

The spelling of 505728863 in words is "five hundred five million, seven hundred twenty-eight thousand, eight hundred sixty-three".