505450123 has 8 divisors (see below), whose sum is σ = 509139968. Its totient is φ = 501767784.

The previous prime is 505450117. The next prime is 505450147. The reversal of 505450123 is 321054505.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 505450123 - 2⁹ = 505449611 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 (505450223) 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 7 ways as a sum of consecutive naturals, for example, 234790 + ... + 236932.

It is an arithmetic number, because the mean of its divisors is an integer number (63642496).

Almost surely, 2^505450123 is an apocalyptic number.

505450123 is a deficient number, since it is larger than the sum of its proper divisors (3689845).

505450123 is a wasteful number, since it uses less digits than its factorization.

505450123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3753.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 505450123 is about 22482.2179288432. The cubic root of 505450123 is about 796.5739544388.

The spelling of 505450123 in words is "five hundred five million, four hundred fifty thousand, one hundred twenty-three".