1243323413 has 4 divisors (see below), whose sum is σ = 1250951328. Its totient is φ = 1235695500.

The previous prime is 1243323391. The next prime is 1243323451. The reversal of 1243323413 is 3143233421.

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 1243323413 - 2⁸ = 1243323157 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 (1243323013) 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, 3813713 + ... + 3814038.

It is an arithmetic number, because the mean of its divisors is an integer number (312737832).

Almost surely, 2^1243323413 is an apocalyptic number.

It is an amenable number.

1243323413 is a deficient number, since it is larger than the sum of its proper divisors (7627915).

1243323413 is an equidigital number, since it uses as much as digits as its factorization.

1243323413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7627914.

The product of its digits is 5184, while the sum is 26.

The square root of 1243323413 is about 35260.7914403520. The cubic root of 1243323413 is about 1075.2960174160.

Adding to 1243323413 its reverse (3143233421), we get a palindrome (4386556834).

The spelling of 1243323413 in words is "one billion, two hundred forty-three million, three hundred twenty-three thousand, four hundred thirteen".