505050503 has 4 divisors (see below), whose sum is σ = 505441200. Its totient is φ = 504659808.

The previous prime is 505050493. The next prime is 505050517. The reversal of 505050503 is 305050505.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305050505 = 5 ⋅61010101.

It is a cyclic number.

It is not a de Polignac number, because 505050503 - 2⁶ = 505050439 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505050563) 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, 193403 + ... + 195996.

It is an arithmetic number, because the mean of its divisors is an integer number (126360300).

Almost surely, 2^505050503 is an apocalyptic number.

505050503 is a deficient number, since it is larger than the sum of its proper divisors (390697).

505050503 is a wasteful number, since it uses less digits than its factorization.

505050503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390696.

The product of its (nonzero) digits is 1875, while the sum is 23.

The square root of 505050503 is about 22473.3287031539. The cubic root of 505050503 is about 796.3639694518.

The spelling of 505050503 in words is "five hundred five million, fifty thousand, five hundred three".