1213442323 has 4 divisors (see below), whose sum is σ = 1214025840. Its totient is φ = 1212858808.

The previous prime is 1213442311. The next prime is 1213442341. The reversal of 1213442323 is 3232443121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3232443121 = 17 ⋅190143713.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213442323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213442383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288628 + ... + 292801.

It is an arithmetic number, because the mean of its divisors is an integer number (303506460).

Almost surely, 2^1213442323 is an apocalyptic number.

1213442323 is a deficient number, since it is larger than the sum of its proper divisors (583517).

1213442323 is an equidigital number, since it uses as much as digits as its factorization.

1213442323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583516.

The product of its digits is 3456, while the sum is 25.

The square root of 1213442323 is about 34834.4990347213. The cubic root of 1213442323 is about 1066.6117888542.

Adding to 1213442323 its reverse (3232443121), we get a palindrome (4445885444).

The spelling of 1213442323 in words is "one billion, two hundred thirteen million, four hundred forty-two thousand, three hundred twenty-three".