1313011313 has 4 divisors (see below), whose sum is σ = 1315319460. Its totient is φ = 1310703168.

The previous prime is 1313011309. The next prime is 1313011331. The reversal of 1313011313 is 3131103131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 567011344 + 745999969 = 23812^2 + 27313^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313011313 - 2² = 1313011309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313011291 and 1313011300.

It is not an unprimeable number, because it can be changed into a prime (1313011333) 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, 1153220 + ... + 1154357.

It is an arithmetic number, because the mean of its divisors is an integer number (328829865).

Almost surely, 2^1313011313 is an apocalyptic number.

It is an amenable number.

1313011313 is a deficient number, since it is larger than the sum of its proper divisors (2308147).

1313011313 is an equidigital number, since it uses as much as digits as its factorization.

1313011313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308146.

The product of its (nonzero) digits is 81, while the sum is 17.

The square root of 1313011313 is about 36235.4979681527. The cubic root of 1313011313 is about 1095.0219446128.

Adding to 1313011313 its reverse (3131103131), we get a palindrome (4444114444).

The spelling of 1313011313 in words is "one billion, three hundred thirteen million, eleven thousand, three hundred thirteen".