505752329 has 4 divisors (see below), whose sum is σ = 535502484. Its totient is φ = 476002176.

The previous prime is 505752311. The next prime is 505752337. The reversal of 505752329 is 923257505.

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

It can be written as a sum of positive squares in 2 ways, for example, as 228463225 + 277289104 = 15115^2 + 16652^2 .

It is not a de Polignac number, because 505752329 - 2¹⁶ = 505686793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 505752292 and 505752301.

It is not an unprimeable number, because it can be changed into a prime (505752389) 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 in 3 ways as a sum of consecutive naturals, for example, 14875052 + ... + 14875085.

It is an arithmetic number, because the mean of its divisors is an integer number (133875621).

Almost surely, 2^505752329 is an apocalyptic number.

It is an amenable number.

505752329 is a deficient number, since it is larger than the sum of its proper divisors (29750155).

505752329 is a wasteful number, since it uses less digits than its factorization.

505752329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29750154.

The product of its (nonzero) digits is 94500, while the sum is 38.

The square root of 505752329 is about 22488.9379251222. The cubic root of 505752329 is about 796.7326786179.

The spelling of 505752329 in words is "five hundred five million, seven hundred fifty-two thousand, three hundred twenty-nine".