1313243205 has 16 divisors (see below), whose sum is σ = 2109006720. Its totient is φ = 697790528.

The previous prime is 1313243179. The next prime is 1313243219. The reversal of 1313243205 is 5023423131.

It is a cyclic number.

It is not a de Polignac number, because 1313243205 - 2¹⁴ = 1313226821 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158697 + ... + 166766.

It is an arithmetic number, because the mean of its divisors is an integer number (131812920).

Almost surely, 2^1313243205 is an apocalyptic number.

1313243205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1313243205 is a deficient number, since it is larger than the sum of its proper divisors (795763515).

1313243205 is a wasteful number, since it uses less digits than its factorization.

1313243205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325740.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 1313243205 is about 36238.6976173262. The cubic root of 1313243205 is about 1095.0864050580.

Adding to 1313243205 its reverse (5023423131), we get a palindrome (6336666336).

The spelling of 1313243205 in words is "one billion, three hundred thirteen million, two hundred forty-three thousand, two hundred five".