1323503003 has 4 divisors (see below), whose sum is σ = 1324624848. Its totient is φ = 1322381160.

The previous prime is 1323502997. The next prime is 1323503021. The reversal of 1323503003 is 3003053231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3003053231 = 2879 ⋅1043089.

It is a cyclic number.

It is not a de Polignac number, because 1323503003 - 2³⁰ = 249761179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1323503303) 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 3 ways as a sum of consecutive naturals, for example, 559151 + ... + 561512.

It is an arithmetic number, because the mean of its divisors is an integer number (331156212).

Almost surely, 2^1323503003 is an apocalyptic number.

1323503003 is a deficient number, since it is larger than the sum of its proper divisors (1121845).

1323503003 is a wasteful number, since it uses less digits than its factorization.

1323503003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121844.

The product of its (nonzero) digits is 810, while the sum is 20.

The square root of 1323503003 is about 36379.9807998850. The cubic root of 1323503003 is about 1097.9308217393.

Adding to 1323503003 its reverse (3003053231), we get a palindrome (4326556234).

The spelling of 1323503003 in words is "one billion, three hundred twenty-three million, five hundred three thousand, three".