505011999 has 8 divisors (see below), whose sum is σ = 673475632. Its totient is φ = 336611520.

The previous prime is 505011953. The next prime is 505012021. The reversal of 505011999 is 999110505.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 505011999 - 2⁸ = 505011743 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 (505011499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7989 + ... + 32769.

It is an arithmetic number, because the mean of its divisors is an integer number (84184454).

Almost surely, 2^505011999 is an apocalyptic number.

505011999 is a deficient number, since it is larger than the sum of its proper divisors (168463633).

505011999 is a wasteful number, since it uses less digits than its factorization.

505011999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31577.

The product of its (nonzero) digits is 18225, while the sum is 39.

The square root of 505011999 is about 22472.4720269044. The cubic root of 505011999 is about 796.3437312265.

The spelling of 505011999 in words is "five hundred five million, eleven thousand, nine hundred ninety-nine".