503383821397 has 16 divisors (see below), whose sum is σ = 520950320640. Its totient is φ = 485901561600.

The previous prime is 503383821359. The next prime is 503383821419. The reversal of 503383821397 is 793128383305.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-503383821397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503383821197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27819129 + ... + 27837217.

It is an arithmetic number, because the mean of its divisors is an integer number (32559395040).

Almost surely, 2^503383821397 is an apocalyptic number.

It is an amenable number.

503383821397 is a deficient number, since it is larger than the sum of its proper divisors (17566499243).

503383821397 is a wasteful number, since it uses less digits than its factorization.

503383821397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20364.

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 503383821397 in words is "five hundred three billion, three hundred eighty-three million, eight hundred twenty-one thousand, three hundred ninety-seven".