1313423243 has 4 divisors (see below), whose sum is σ = 1432825368. Its totient is φ = 1194021120.

The previous prime is 1313423239. The next prime is 1313423273. The reversal of 1313423243 is 3423243131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1313423243 - 2² = 1313423239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313423273) 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, 59701046 + ... + 59701067.

It is an arithmetic number, because the mean of its divisors is an integer number (358206342).

Almost surely, 2^1313423243 is an apocalyptic number.

1313423243 is a deficient number, since it is larger than the sum of its proper divisors (119402125).

1313423243 is a wasteful number, since it uses less digits than its factorization.

1313423243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119402124.

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

The square root of 1313423243 is about 36241.1815894570. The cubic root of 1313423243 is about 1095.1364460955.

Adding to 1313423243 its reverse (3423243131), we get a palindrome (4736666374).

The spelling of 1313423243 in words is "one billion, three hundred thirteen million, four hundred twenty-three thousand, two hundred forty-three".