1323043013 has 4 divisors (see below), whose sum is σ = 1323444960. Its totient is φ = 1322641068.

The previous prime is 1323043009. The next prime is 1323043019. The reversal of 1323043013 is 3103403231.

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 1323043013 - 2² = 1323043009 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 (1323043019) 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, 195995 + ... + 202632.

It is an arithmetic number, because the mean of its divisors is an integer number (330861240).

Almost surely, 2^1323043013 is an apocalyptic number.

It is an amenable number.

1323043013 is a deficient number, since it is larger than the sum of its proper divisors (401947).

1323043013 is an equidigital number, since it uses as much as digits as its factorization.

1323043013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401946.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 1323043013 is about 36373.6582295485. The cubic root of 1323043013 is about 1097.8036099087.

Adding to 1323043013 its reverse (3103403231), we get a palindrome (4426446244).

The spelling of 1323043013 in words is "one billion, three hundred twenty-three million, forty-three thousand, thirteen".