505079999 has 4 divisors (see below), whose sum is σ = 505134336. Its totient is φ = 505025664.

The previous prime is 505079989. The next prime is 505080071. The reversal of 505079999 is 999970505.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 505079999 - 2¹⁶ = 505014463 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 505079999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505079909) 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, 9314 + ... + 33119.

It is an arithmetic number, because the mean of its divisors is an integer number (126283584).

Almost surely, 2^505079999 is an apocalyptic number.

505079999 is a deficient number, since it is larger than the sum of its proper divisors (54337).

505079999 is a wasteful number, since it uses less digits than its factorization.

505079999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54336.

The product of its (nonzero) digits is 1148175, while the sum is 53.

The square root of 505079999 is about 22473.9849381457. The cubic root of 505079999 is about 796.3794722541.

It can be divided in two parts, 50507 and 9999, that added together give a palindrome (60506).

The spelling of 505079999 in words is "five hundred five million, seventy-nine thousand, nine hundred ninety-nine".