505188899 has 2 divisors, whose sum is σ = 505188900. Its totient is φ = 505188898.

The previous prime is 505188877. The next prime is 505188907. The reversal of 505188899 is 998881505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505188899 - 2¹² = 505184803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505188899.

It is not a weakly prime, because it can be changed into another prime (505188809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252594449 + 252594450.

It is an arithmetic number, because the mean of its divisors is an integer number (252594450).

Almost surely, 2^505188899 is an apocalyptic number.

505188899 is a deficient number, since it is larger than the sum of its proper divisors (1).

505188899 is an equidigital number, since it uses as much as digits as its factorization.

505188899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 53.

The square root of 505188899 is about 22476.4076088685. The cubic root of 505188899 is about 796.4367037768.

The spelling of 505188899 in words is "five hundred five million, one hundred eighty-eight thousand, eight hundred ninety-nine".