503311923 has 24 divisors (see below), whose sum is σ = 738296000. Its totient is φ = 330355584.

The previous prime is 503311901. The next prime is 503311927. The reversal of 503311923 is 329113305.

It is a happy number.

It is not a de Polignac number, because 503311923 - 2⁸ = 503311667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (503311927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 324153 + ... + 325701.

Almost surely, 2^503311923 is an apocalyptic number.

503311923 is a deficient number, since it is larger than the sum of its proper divisors (234984077).

503311923 is a wasteful number, since it uses less digits than its factorization.

503311923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2091 (or 2088 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 503311923 is about 22434.6143938335. The cubic root of 503311923 is about 795.4491208587.

The spelling of 503311923 in words is "five hundred three million, three hundred eleven thousand, nine hundred twenty-three".