505055791 has 2 divisors, whose sum is σ = 505055792. Its totient is φ = 505055790.

The previous prime is 505055743. The next prime is 505055797. The reversal of 505055791 is 197550505.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505055791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505055791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505055797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252527895 + 252527896.

It is an arithmetic number, because the mean of its divisors is an integer number (252527896).

Almost surely, 2^505055791 is an apocalyptic number.

505055791 is a deficient number, since it is larger than the sum of its proper divisors (1).

505055791 is an equidigital number, since it uses as much as digits as its factorization.

505055791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39375, while the sum is 37.

The square root of 505055791 is about 22473.4463534190. The cubic root of 505055791 is about 796.3667488160.

The spelling of 505055791 in words is "five hundred five million, fifty-five thousand, seven hundred ninety-one".