505605203 has 4 divisors (see below), whose sum is σ = 506746968. Its totient is φ = 504463440.

The previous prime is 505605197. The next prime is 505605209. The reversal of 505605203 is 302506505.

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

It is an interprime number because it is at equal distance from previous prime (505605197) and next prime (505605209).

It is a cyclic number.

It is not a de Polignac number, because 505605203 - 2⁴ = 505605187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505605209) 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, 570218 + ... + 571103.

It is an arithmetic number, because the mean of its divisors is an integer number (126686742).

Almost surely, 2^505605203 is an apocalyptic number.

505605203 is a deficient number, since it is larger than the sum of its proper divisors (1141765).

505605203 is a wasteful number, since it uses less digits than its factorization.

505605203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141764.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 505605203 is about 22485.6666123111. Note that the first 4 decimals coincide. The cubic root of 505605203 is about 796.6554132228.

The spelling of 505605203 in words is "five hundred five million, six hundred five thousand, two hundred three".