999000000503 has 2 divisors, whose sum is σ = 999000000504. Its totient is φ = 999000000502.

The previous prime is 999000000463. The next prime is 999000000527. The reversal of 999000000503 is 305000000999.

It is a strong prime.

It is an emirp because it is prime and its reverse (305000000999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999000000503 - 2²² = 998995806199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999000000563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499500000251 + 499500000252.

It is an arithmetic number, because the mean of its divisors is an integer number (499500000252).

Almost surely, 2^999000000503 is an apocalyptic number.

999000000503 is a deficient number, since it is larger than the sum of its proper divisors (1).

999000000503 is an equidigital number, since it uses as much as digits as its factorization.

999000000503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10935, while the sum is 35.

The spelling of 999000000503 in words is "nine hundred ninety-nine billion, five hundred three", and thus it is an aban number.