505052123 has 4 divisors (see below), whose sum is σ = 513331728. Its totient is φ = 496772520.

The previous prime is 505052089. The next prime is 505052143. The reversal of 505052123 is 321250505.

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

It is a cyclic number.

It is not a de Polignac number, because 505052123 - 2⁶ = 505052059 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505052143) 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 3 ways as a sum of consecutive naturals, for example, 4139711 + ... + 4139832.

It is an arithmetic number, because the mean of its divisors is an integer number (128332932).

Almost surely, 2^505052123 is an apocalyptic number.

505052123 is a deficient number, since it is larger than the sum of its proper divisors (8279605).

505052123 is an equidigital number, since it uses as much as digits as its factorization.

505052123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8279604.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 505052123 is about 22473.3647458497. The cubic root of 505052123 is about 796.3648209232.

The spelling of 505052123 in words is "five hundred five million, fifty-two thousand, one hundred twenty-three".