505017999 has 6 divisors (see below), whose sum is σ = 729470456. Its totient is φ = 336678660.

The previous prime is 505017983. The next prime is 505018001. The reversal of 505017999 is 999710505.

505017999 is a `hidden beast` number, since 50 + 501 + 7 + 9 + 99 = 666.

It is not a de Polignac number, because 505017999 - 2⁴ = 505017983 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 (505017949) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28056547 + ... + 28056564.

Almost surely, 2^505017999 is an apocalyptic number.

505017999 is a deficient number, since it is larger than the sum of its proper divisors (224452457).

505017999 is a wasteful number, since it uses less digits than its factorization.

505017999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56113117 (or 56113114 counting only the distinct ones).

The product of its (nonzero) digits is 127575, while the sum is 45.

The square root of 505017999 is about 22472.6055231698. The cubic root of 505017999 is about 796.3468849756.

The spelling of 505017999 in words is "five hundred five million, seventeen thousand, nine hundred ninety-nine".