503666993 has 8 divisors (see below), whose sum is σ = 517797120. Its totient is φ = 489679200.

The previous prime is 503666987. The next prime is 503667053. The reversal of 503666993 is 399666305.

It is a happy number.

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 503666993 - 2¹⁸ = 503404849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is not an unprimeable number, because it can be changed into a prime (503666923) 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, 28388 + ... + 42581.

It is an arithmetic number, because the mean of its divisors is an integer number (64724640).

Almost surely, 2^503666993 is an apocalyptic number.

It is an amenable number.

503666993 is a deficient number, since it is larger than the sum of its proper divisors (14130127).

503666993 is a wasteful number, since it uses less digits than its factorization.

503666993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71167.

The product of its (nonzero) digits is 787320, while the sum is 47.

The square root of 503666993 is about 22442.5264397750. The cubic root of 503666993 is about 795.6361312824.

The spelling of 503666993 in words is "five hundred three million, six hundred sixty-six thousand, nine hundred ninety-three".