505510723 has 4 divisors (see below), whose sum is σ = 508157568. Its totient is φ = 502863880.

The previous prime is 505510711. The next prime is 505510729. The reversal of 505510723 is 327015505.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505510723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 505510691 and 505510700.

It is not an unprimeable number, because it can be changed into a prime (505510729) 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, 1323136 + ... + 1323517.

It is an arithmetic number, because the mean of its divisors is an integer number (127039392).

Almost surely, 2^505510723 is an apocalyptic number.

505510723 is a deficient number, since it is larger than the sum of its proper divisors (2646845).

505510723 is a wasteful number, since it uses less digits than its factorization.

505510723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2646844.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 505510723 is about 22483.5656202480. The cubic root of 505510723 is about 796.6057877496.

The spelling of 505510723 in words is "five hundred five million, five hundred ten thousand, seven hundred twenty-three".