1323203513 has 4 divisors (see below), whose sum is σ = 1339145808. Its totient is φ = 1307261220.

The previous prime is 1323203489. The next prime is 1323203527. The reversal of 1323203513 is 3153023231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1323203513 - 2¹⁸ = 1322941369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1323203543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7971023 + ... + 7971188.

It is an arithmetic number, because the mean of its divisors is an integer number (334786452).

Almost surely, 2^1323203513 is an apocalyptic number.

It is an amenable number.

1323203513 is a deficient number, since it is larger than the sum of its proper divisors (15942295).

1323203513 is an equidigital number, since it uses as much as digits as its factorization.

1323203513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15942294.

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 1323203513 is about 36375.8644295912. The cubic root of 1323203513 is about 1097.8480000893.

Adding to 1323203513 its reverse (3153023231), we get a palindrome (4476226744).

The spelling of 1323203513 in words is "one billion, three hundred twenty-three million, two hundred three thousand, five hundred thirteen".