505200999 has 4 divisors (see below), whose sum is σ = 673601336. Its totient is φ = 336800664.

The previous prime is 505200989. The next prime is 505201007. The reversal of 505200999 is 999002505.

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

It is not a de Polignac number, because 505200999 - 2⁸ = 505200743 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 (505200919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84200164 + ... + 84200169.

It is an arithmetic number, because the mean of its divisors is an integer number (168400334).

Almost surely, 2^505200999 is an apocalyptic number.

505200999 is a deficient number, since it is larger than the sum of its proper divisors (168400337).

505200999 is a wasteful number, since it uses less digits than its factorization.

505200999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168400336.

The product of its (nonzero) digits is 36450, while the sum is 39.

The square root of 505200999 is about 22476.6767783852. The cubic root of 505200999 is about 796.4430623272.

The spelling of 505200999 in words is "five hundred five million, two hundred thousand, nine hundred ninety-nine".